提取公因式计算题 急1.(b-a)2次+a(a-b)+b(b-a) 2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)4.x(b+c-d)-y(d-b-c)-c-b+d 5.x平方+x+4分之一6.8a-4a平方-4

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提取公因式计算题急1.(b-a)2次+a(a-b)+b(b-a)2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)4.x(b+c-d)-y(d-b-c)-c-b+d5.x平方+x+4分

提取公因式计算题 急1.(b-a)2次+a(a-b)+b(b-a) 2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)4.x(b+c-d)-y(d-b-c)-c-b+d 5.x平方+x+4分之一6.8a-4a平方-4
提取公因式计算题 急
1.(b-a)2次+a(a-b)+b(b-a) 2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)4.x(b+c-d)-y(d-b-c)-c-b+d 5.x平方+x+4分之一6.8a-4a平方-4

提取公因式计算题 急1.(b-a)2次+a(a-b)+b(b-a) 2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)4.x(b+c-d)-y(d-b-c)-c-b+d 5.x平方+x+4分之一6.8a-4a平方-4
1. (b-a)²+a(a-b)+b(b-a)
= (b-a)²-a(b-a)+b(b-a)
= (b-a-a+b)×(b-a)
= (2b-2a)×(b-a)
= 2(b-a)×(b-a)
= 2(b-a)²
2. (3a-4b)×(7a-8b)+(11a-12b)×(8b-7a)
= (3a-4b)×(7a-8b)-(11a-12b)×(7a-8b)
= (7a-8b)×(3a-4b-11a+12b)
= (7a-8b)×(-8a+8b)
= -8(a-b)(7a-8b)
3. x(b+c-d)- y(d-b-c)- c -b+d
= x(b+c-d)+y(b+c-d)+(b+c-d)
= (b+c-d)×(x+y+1)
4. x²+x+1/4
= (x+1/2)×(x+1/2)
= (x+1/2)²
5. 8a-4a²-4
= -(4a²-8a+4)
= -【4(a²-2a+1)】
= - 4(a-1)²

1.(b-a)²+a(a-b)+b(b-a)
=(b-a)²-a(b-a)+b(b-a)
=(b-a)(b-a-a+b)
=(b-a)(2b-2a)
=2(b-a)²

2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)
=(3a-4b)(7a-8b)-...

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1.(b-a)²+a(a-b)+b(b-a)
=(b-a)²-a(b-a)+b(b-a)
=(b-a)(b-a-a+b)
=(b-a)(2b-2a)
=2(b-a)²

2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)
=(3a-4b)(7a-8b)-(11a-12b)(7a-8b)
=(7a-8b)(3a-4b-11a+12b)
=(7a-8b)(8b-8a)
=8(7a-8b)(b-a)

4. x(b+c-d)-y(d-b-c)-c-b+d
=x(b+c-d)+y(b+c-d)-(b+c-d)
=(b+c-d)(x+y-1)

5.x²+x+1/4
=1/4(4x²+4x+1)
=1/4(2x+1)²

6.8a-4a²-4
=-4(a²-2a+1)
=-4(a-1)²

收起

1.(b-a)²+a(a-b)+b(b-a)
=(a-b)²+a(a-b)-b(a-b)
=(a-b)(a-b+a-b)
=(a-b)(2a-2b)
=2(a-b)²
2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)
=(3a-4b)(7a-8b)-(11a-12b)(7a-8b)
=(3a-4...

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1.(b-a)²+a(a-b)+b(b-a)
=(a-b)²+a(a-b)-b(a-b)
=(a-b)(a-b+a-b)
=(a-b)(2a-2b)
=2(a-b)²
2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)
=(3a-4b)(7a-8b)-(11a-12b)(7a-8b)
=(3a-4b-11a+12b)(7a-8b)
=(-8a+8b)(7a-8b)
=-8(a-b)(7a-8b)
4. x(b+c-d)-y(d-b-c)-c-b+d
= x(b+c-d)+y(b+c-d)-(b+c-d)
= (x+y-1)(b+c-d)
5.x平方+x+4分之一
=(1/4)(4x²+4x+1)
=(x+1/2)^2
6.8a-4a平方-4
=-4(a^2-2a+1)
=-4(a-1)^2

收起

1.(b-a)^2+a(a-b)+b(b-a)
=(b-a) (b-a-a+b)
=2(b-a)^2
2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)
=(7a-8b)(3a-4b-11a+12b)
=(7a-8b)(-7a+8b)= -(7a-8b)^2
4 x(b+c-d)-y(d-b-c)-c-b+d
=(b+c-d)(x+y-1)
5.x^2+x+1/4=(x+1/2)^2
6.8a-4a^2-4= -(4a^2-8a+4)= -4(a-1)^2

1.(b-a)2次+a(a-b)+b(b-a)
=(b-a)2次-a(b-a)+b(b-a)
=(b-a)(b-a-a+b)
=2(b-a)(b-a)
2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)
=(3a-4b)(7a-8b)-(11a-12b)(7a-8b)
=(3a-4b-11a+12b)(7a-8b)
=(-8a...

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1.(b-a)2次+a(a-b)+b(b-a)
=(b-a)2次-a(b-a)+b(b-a)
=(b-a)(b-a-a+b)
=2(b-a)(b-a)
2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)
=(3a-4b)(7a-8b)-(11a-12b)(7a-8b)
=(3a-4b-11a+12b)(7a-8b)
=(-8a+8b)(7a-8b)
=-8(a-b)(7a-8b)
4. x(b+c-d)-y(d-b-c)-c-b+d
= x(b+c-d)+y(b+c-d)-(b+c-d)
= (x+y-1)(b+c-d)
5.x平方+x+4分之一
=(x+1/2)^2
6.8a-4a平方-4
=-4(a^2-2a+1)
=-4(a-1)^2

收起