1.4x^-4x+1 2.-3x^+6xy-3y^ 3.3ax^+6axy+3ay^ 4.(a+b)^-12(a+b)+36 5.1+10t+25t^ 6.m^-14m+49m 7.y^+y+1/4(4分之1)8.(m+n)^-4m(m+n)+4m^ 9.a^+2a(b+c)+(b+c)^10.(a-b)^+4ab 11.25a^-80a+64

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1.4x^-4x+12.-3x^+6xy-3y^3.3ax^+6axy+3ay^4.(a+b)^-12(a+b)+365.1+10t+25t^6.m^-14m+49m7.y^+y+1/4(4分之1)8

1.4x^-4x+1 2.-3x^+6xy-3y^ 3.3ax^+6axy+3ay^ 4.(a+b)^-12(a+b)+36 5.1+10t+25t^ 6.m^-14m+49m 7.y^+y+1/4(4分之1)8.(m+n)^-4m(m+n)+4m^ 9.a^+2a(b+c)+(b+c)^10.(a-b)^+4ab 11.25a^-80a+64
1.4x^-4x+1 2.-3x^+6xy-3y^ 3.3ax^+6axy+3ay^
4.(a+b)^-12(a+b)+36 5.1+10t+25t^
6.m^-14m+49m 7.y^+y+1/4(4分之1)
8.(m+n)^-4m(m+n)+4m^ 9.a^+2a(b+c)+(b+c)^
10.(a-b)^+4ab
11.25a^-80a+64

1.4x^-4x+1 2.-3x^+6xy-3y^ 3.3ax^+6axy+3ay^ 4.(a+b)^-12(a+b)+36 5.1+10t+25t^ 6.m^-14m+49m 7.y^+y+1/4(4分之1)8.(m+n)^-4m(m+n)+4m^ 9.a^+2a(b+c)+(b+c)^10.(a-b)^+4ab 11.25a^-80a+64
1、原式=(2x^)2-2*2x+1^2=(2X-1)^2
2、原式=-3(X^2-2XY+Y^2)-3(X-Y)^2
3、原式=3a(X^2+2XY+Y^2)=3a(X+Y)^2
4、原式=(a+b)^2-2*6(a+b)+6^2=(a+b-6)^2
5、原式=1^2+2*5*t+(5t)^2=(1+5t)^2
6、原式=m^2-2*7*m+7^2=(m-7)^2
7、原式=Y^2+2*Y*(1/2)+(1/2)^2=(Y+1/2)^2
8、原式=(m+n-2m)^2=(n-m)^2
9、原式=a^+2*a*(b+c)+(b+c)^ 2=(a+b+c)^2
10、原式=a^2+b^2+2ab=(a+b)^2
11、原式=(5a)^2-2*5*8a+8^2=(5a-8)^2

1. 4x^-4x+1
=(2x-1)^
2. -3x^+6xy-3y^
=-3(x^-2xy+y^)
=-3(x-y)^
3. 3ax^+6axy+3ay^
=3a(x^+2xy+y^)
=3a(x+y)^
4. (a+b)^-12(a+b)+36
=(a+b)^-2*(a+b)*6+6^
=(a+b-6)^<...

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1. 4x^-4x+1
=(2x-1)^
2. -3x^+6xy-3y^
=-3(x^-2xy+y^)
=-3(x-y)^
3. 3ax^+6axy+3ay^
=3a(x^+2xy+y^)
=3a(x+y)^
4. (a+b)^-12(a+b)+36
=(a+b)^-2*(a+b)*6+6^
=(a+b-6)^
5. 1+10t+25t^
=(1+5t)^
6. m^-14m+49m
=m(m-14+49)
=m(m+35)
7. y^+y+1/4(4分之1)
=y^+2*y*1/2+(1/2)^
=(y+1/2)^
8. (m+n)^-4m(m+n)+4m^
=(m+n)^-2*(m+n)*2m+(2m)^
=(m+n-2m)^
=(n-m)^
9. a^+2a(b+c)+(b+c)^
=(a+b+c)^
10. (a-b)^+4ab
=a^-2ab+b^+4ab
=a^+2ab+b^
=(a+b)^

收起

1、原式=(2x^)2-2*2x+1^2=(2X-1)^2
2、原式=-3(X^2-2XY+Y^2)-3(X-Y)^2
3、原式=3a(X^2+2XY+Y^2)=3a(X+Y)^2
4、原式=(a+b)^2-2*6(a+b)+6^2=(a+b-6)^2
5、原式=1^2+2*5*t+(5t)^2=(1+5t)^2
6、原式=m^2-2*7*m+7^...

全部展开

1、原式=(2x^)2-2*2x+1^2=(2X-1)^2
2、原式=-3(X^2-2XY+Y^2)-3(X-Y)^2
3、原式=3a(X^2+2XY+Y^2)=3a(X+Y)^2
4、原式=(a+b)^2-2*6(a+b)+6^2=(a+b-6)^2
5、原式=1^2+2*5*t+(5t)^2=(1+5t)^2
6、原式=m^2-2*7*m+7^2=(m-7)^2
7、原式=Y^2+2*Y*(1/2)+(1/2)^2=(Y+1/2)^2
8、原式=(m+n-2m)^2=(n-m)^2
9、原式=a^+2*a*(b+c)+(b+c)^ 2=(a+b+c)^2
10、原式=a^2+b^2+2ab=(a+b)^2

收起

*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 难倒爱因斯坦的九宫格X 7 X | X 8 1 | X X X |X X X | X 4 X | 7 5 9 |X X 5 | 7 X 9 | X 1 4 |5 X X | X X 8 | 3 9 X |3 9 6 | 4 X 7 | X X 2 |X 8 7 | 9 X X | X X X |4 X X | 6 X 5 | X X X | X X 4 | X X 1 |2 X X | X X X | X X X | X 3 X | X X X |X 6 如下9*9宫图如何填x x x 1 x x x 2 9x x 5 x x x x x 4x 6 8 x x x x x xx x x 7 x x 5 x xx 2 x x 6 x x 8 xx x 3 x x 9 x x xx x x x 5 x 1 6 x 4 x x x 3 x x x x 7 x x x x 2 x x x 解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 计算:[(x^2 - 4)/(x^2 - x - 6) + (x+2)/(x-3)] / (x+1)/(x-3) (x-1)/(x+3x+2)+6/(2+x-x)-(10-x)/(4-x) x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 1.【x-1分之x平方+3x+2】+【6分之2+x-x平方】-【10-x分之4-x平方】2.【x+1-1分之1-x】除以【x-x平方分之x-1】3.【x平方-4分之x平方-x-6】+【x+2分之x-3】这个结果再除以【x+1分之x-3】4.【x分之x-y】乘以 1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/(x^2-5x+6)+(x^2-3x+8)/(x^2-4x+3)2.{(x^2)/(x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{(x^2/x^2+y^2)^2} 解决数独问题x 1 x 7 x x x 3 xx x x x 4 x 2 x x9 x 3 6 x 8 7 x 58 x x x x 9 x x xx x 2 x 5 x x x 4x 3 x x x x 6 x xx x x x x x x x 26 x x x x x x x 7x 5 4 1 7 x 9 8 x这道题我用了很多办法都没有头绪,请帮忙的朋友把解题的思 1.4/3x+1/2x=1 2.x-4/5x=5/6 1.(x*2-3x+3)/(x*2-3x+2)-(x*2-5x+7)/(x*2-5x+6)-1/(x*2-4x+3)2.1/x(x+1)+2/(x+1)(x+3)+3/(x+3)(x+6) 3.已知:x*2-3x+1=0,求x*2+1/x*2. 1.x/x-y * y^2/x+y -x^4y/x^4-y^4÷ x^2/x^2+y^2 2.(x^2-4/x^2-x-6+ x+2/x-3)÷ x+1/x-33.(x+1-1/1-x)÷(x- x^2/x-1)4.x-1/x^2+3x+2/6/2+x-x^2-10-x/4-x^21111111111111111111111111111111 [3/x]-[4/x-1]=6/x-x² [3/x]-[4/x-1]=6/x-x²