.把下列各式分解因式:(说明下,圈圈里的数字是次方,比如3次方是③,这可以按V+2打出){1}x(a+b)+y(a+b) {2}3a(x-y)-(x-y) {3}6(p+q)②-12(q+p){4}a(m-2)+b(2-m) {5}2(y-x)②+3(x-y) {6}mn(m-n)-m(n-m)②{7}7(a-1)+x(a-1) {8}3(a-b)
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.把下列各式分解因式:(说明下,圈圈里的数字是次方,比如3次方是③,这可以按V+2打出){1}x(a+b)+y(a+b) {2}3a(x-y)-(x-y) {3}6(p+q)②-12(q+p){4}a(m-2)+b(2-m) {5}2(y-x)②+3(x-y) {6}mn(m-n)-m(n-m)②{7}7(a-1)+x(a-1) {8}3(a-b)
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把下列各式分解因式:(说明下,圈圈里的数字是次方,比如3次方是③,这可以按V+2打出)
{1}x(a+b)+y(a+b) {2}3a(x-y)-(x-y) {3}6(p+q)②-12(q+p)
{4}a(m-2)+b(2-m) {5}2(y-x)②+3(x-y) {6}mn(m-n)-m(n-m)②
{7}7(a-1)+x(a-1) {8}3(a-b)②+6(b-a)
在下列各式等号右边的括号前写入‘+’或‘-’使等式成立!
{1}2-a=________(a-2)
{2}y-x=________(x-y)
{3}b+a=________(a+b)
{4}(b-a)②=_____(a-b)
{5}-m-n=_______(m+n)
{6}-s②+t②=_______(s②-t②)
.把下列各式分解因式:(说明下,圈圈里的数字是次方,比如3次方是③,这可以按V+2打出){1}x(a+b)+y(a+b) {2}3a(x-y)-(x-y) {3}6(p+q)②-12(q+p){4}a(m-2)+b(2-m) {5}2(y-x)②+3(x-y) {6}mn(m-n)-m(n-m)②{7}7(a-1)+x(a-1) {8}3(a-b)
{1}x(a+b)+y(a+b)
=(a+b)(x+y)
{2}3a(x-y)-(x-y)
=(x-y)(3a-1)
{3}6(p+q)②-12(q+p)
=6(p+q)[(p+q)-2]
=6(p+q)(p+q-2)
{4}a(m-2)+b(2-m)
=a(m-2)+b(m-2)
=(m-2)(a+b)
{5}2(y-x)②+3(x-y)
=2(x-y)②+3(x-y)
=(x-y)[2(x-y)+3]
=(x-y)(2x-2y+3)
{6}mn(m-n)-m(n-m)②
=mn(m-n)-m(m-n)②
=m(m-n)[n-(m-n)]
=m(m-n)(n-m+n)
=m(m-n)(2n-m)
{7}7(a-1)+x(a-1)
=(a-1)(7+x)
{8}3(a-b)②+6(b-a)
=3(a-b)②-6(a-b)
=3(a-b)(a-b-2)
问题2
在下列各式等号右边的括号前写入‘+’或‘-’使等式成立!
{1}2-a=-(a-2)
{2}y-x=-(x-y)
{3}b+a=+(a+b)
{4}(b-a)②=+(a-b)②
{5}-m-n=-(m+n)
{6}-s②+t②=-(s②-t②)
1.(x+y)(a+b) 2.(3a-1)(x-y) 3.6(p+q-2)(q+p) 4.(b-a)(2-m)
5.(2x-2y+3)(x-y) 6.m(n+1)(m-n) 7.(7+x)(a-1) 8.3(b-a+2)(b-a)
1.- 2.- 3.+ 4.+ 5.- 6.- 上面的那个人打字真快啊
答案一
1. (a+b)(x+y)
2. (x-y) (3a-1)
3. 6(q+p)(q+p-2)
4. (m-2)(a-b)
5. (x-y)(3-2)
6. m(n-m)(n-1)
7. (a-1)(7+x)
8. (a-b)(3a-3b-6)
答案二
1. -
2. -
3. +
4. + (好像打掉了一个②哦 )
5. -
6. -
{1}(a+b)(x+y) {2}(3a-1 )(x-y) {3}6(p+q) (q+p-2)
{4}(m-2)+ (a-b) {5} (x-y)(2x-2y+3) {6}m(m-n)(n-+1)②
{7}(a-1)(7+x ) {8}...
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{1}(a+b)(x+y) {2}(3a-1 )(x-y) {3}6(p+q) (q+p-2)
{4}(m-2)+ (a-b) {5} (x-y)(2x-2y+3) {6}m(m-n)(n-+1)②
{7}(a-1)(7+x ) {8}3(a-b)(a-b-2)
问题2
在下列各式等号右边的括号前写入‘+’或‘-’使等式成立!
{1}2-a=_______-_(a-2)
{2}y-x=________-(x-y)
{3}b+a=_______+_(a+b)
{4}(b-a)②=__这一个应该不对___(a-b)
{5}-m-n=_____-__(m+n)
{6}-s②+t②=_____-__(s②-t②)
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问题一全部是提取公因式,问题二是添括号法则1、2、5、6、都是负号,其中第三题为正,第四题填(a-b)
答案分别是:
问题一:
{1} (a+b)(x+y) {2}(3a-1)(x-y) {3}6(p+q)(p+q-2)
{4} (m-2)(a-b) {5}(y-x)(2y-2x-3) {6}m(m-n)(n+1)
{7} (7+x)(a-1) {8}3(a-b)(a-b-2)
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答案分别是:
问题一:
{1} (a+b)(x+y) {2}(3a-1)(x-y) {3}6(p+q)(p+q-2)
{4} (m-2)(a-b) {5}(y-x)(2y-2x-3) {6}m(m-n)(n+1)
{7} (7+x)(a-1) {8}3(a-b)(a-b-2)
问题二:
{1} -
{2} -
{3} +
{4} (a-b)
{5} -
{6} -
你可以验证后再给我分。
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1, (x+Y)(a+b) (3a-1)(x-y) 6[(p+q)-2](p+q) (a-b)(m-2)
[2(y-x)-3](y-x) m(n+1)(m-n) (x+7)(a-1) [3(a-b)-6](a-b)
2 -- -- + + -- --
问题1
{1}x(a+b)+y(a+b) =(a+b)(x+y)
{2}3a(x-y)-(x-y) =(x-y)(3a-1)
{3}6(p+q)②-12(q+p)=6(q+p)②-12(q+p)=6(q+p)(q+p-2)
{4}a(m-2)+b(2-m)=a(m-2)-b (m-2)=(m-2)(a-b)
{5}2(y-x)②+3(x-y)=2(x-y...
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问题1
{1}x(a+b)+y(a+b) =(a+b)(x+y)
{2}3a(x-y)-(x-y) =(x-y)(3a-1)
{3}6(p+q)②-12(q+p)=6(q+p)②-12(q+p)=6(q+p)(q+p-2)
{4}a(m-2)+b(2-m)=a(m-2)-b (m-2)=(m-2)(a-b)
{5}2(y-x)②+3(x-y)=2(x-y)②+3(x-y)=(x-y)[2(x-y)+3]=(x-y)(2x-2y+3)
{6}mn(m-n)-m(n-m)②=mn(m-n)-m(m-n)②=m(m-n)(n-m+n)=m(m-n)(2n-m)
{7}7(a-1)+x(a-1)=(a-1)(7+x)
{8}3(a-b)②+6(b-a)=3(b-a)②+6(b-a)=3(b-a)(b-a+2)
问题2
{1}2-a=__-______(a-2)
{2}y-x=__-______(x-y)
{3}b+a=___+_____(a+b)
{4}(b-a)②=___+__(a-b)②
{5}-m-n=____-___(m+n)
{6}-s②+t②=___-_____(s②-t②)
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问题一:
(1)x(a+b)+y(a+b) =xa+xb+ya+yb =a(x+y)+b(x+y)=(a+b)(x+y)
(2)3a(x-y)-(x-y) =(3a-1)(x-y)
(3)6(p+q)②-12(q+p)=(6p+54)(p+q)-12(p+q)=(6p+54-12)(p+q)=(6p+42)(p+q)
(4)a(m-2)+b(2-m)=a(m-2)...
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问题一:
(1)x(a+b)+y(a+b) =xa+xb+ya+yb =a(x+y)+b(x+y)=(a+b)(x+y)
(2)3a(x-y)-(x-y) =(3a-1)(x-y)
(3)6(p+q)②-12(q+p)=(6p+54)(p+q)-12(p+q)=(6p+54-12)(p+q)=(6p+42)(p+q)
(4)a(m-2)+b(2-m)=a(m-2)-b(m-2)=(a-b)(m-2)
(5)2(y-x)②+3(x-y) =(2y-2x-3)(y-x)
(6)mn(m-n)-m(n-m)②=(2mn-m^2)(m-n)
(7)7(a-1)+x(a-1) =(7+x)(a-1)
(8) 3(a-b)②+6(b-a)=(3a-3b-6)(a-b)
问题2
{1}2-a=___-_____(a-2)
{2}y-x=_____-___(x-y)
{3}b+a=_____+___(a+b)
{4}(b-a)②=____-_(a-b)
{5}-m-n=_______-(m+n)
{6}-s②+t②=_____-__(s②-t②)
问题一中有一些过程省略了,看不懂的话可以追问,希望对你有帮助!
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问题一。
把下列各式分解因式:(说明下,,圈圈里的数字是次方,比如3次方是③,这可以按V+2打出)
{1}x(a+b)+y(a+b) = (x+y)(a+b)
{2}3a(x-y)-(x-y) = (3a-1)(x-y)
{3}6(p+q)②-12(q+p) = 6(p+q-2)(p+q)
{4}a(m-2)+b(2-m) =(a...
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问题一。
把下列各式分解因式:(说明下,,圈圈里的数字是次方,比如3次方是③,这可以按V+2打出)
{1}x(a+b)+y(a+b) = (x+y)(a+b)
{2}3a(x-y)-(x-y) = (3a-1)(x-y)
{3}6(p+q)②-12(q+p) = 6(p+q-2)(p+q)
{4}a(m-2)+b(2-m) =(a-b)(m-2)
{5}2(y-x)②+3(x-y) =(2x-2y+3)(x-y)
{6}mn(m-n)-m(n-m)② = (mn-m②+mn)(m-n)=(2mn-m②)(m-n)
{7}7(a-1)+x(a-1) =(7+x)(a-1)
{8}3(a-b)②+6(b-a) =3(a-b-2)(a-b)
问题2
在下列各式等号右边的括号前写入‘+’或‘-’使等式成立!
{1}2-a=___-_____(a-2)
{2}y-x=___-_____(x-y)
{3}b+a=___+_____(a+b)
{4}(b-a)②=___+__(a-b)②
{5}-m-n=___-____(m+n)
{6}-s②+t②=___-____(s②-t②)
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找规律,比方说(1)把((a+b)看成整体,把公因式提出来,剩下的东西和符号抄下来
(4)把(2-m) 变形成(m-2),把公因式提出来,剩下的东西抄下来
其余的照做,就可以了,学的是方法,不是结果。
一:
1. (a+b)(x+y) 2. (x-y) (3a-1) 3. 6(q+p)(q+p-2) 4. (m-2)(a-b)
5. (x-y)(3-2) 6. m(n-m)(n-1) 7. (a-1)(7+x) 8. 3(a-b)(a-b-2)
二:
1}2-a=-(a-2) {2}y-x=-(x-y) {3}b+a=+(a+b)
{4}(b-a)②=+(a-b)② {5}-m-n=-(m+n) {6}-s②+t②=-(s②-t②)