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+d 5.x平方+x+4分之一6.8a-4a平方-4](/uploads/image/z/2979800-8-0.jpg?t=%E6%8F%90%E5%8F%96%E5%85%AC%E5%9B%A0%E5%BC%8F%E8%AE%A1%E7%AE%97%E9%A2%98+%E6%80%A51.%EF%BC%88b-a%EF%BC%892%E6%AC%A1%2Ba%EF%BC%88a-b%EF%BC%89%2Bb%28b-a%29+2.%283a-4b%29%287a-8b%29%2B%2811a-12b%29%288b-7a%294.x%28b%2Bc-d%29-y%28d-b-c%29-c-b%2Bd+5.x%E5%B9%B3%E6%96%B9%2Bx%2B4%E5%88%86%E4%B9%8B%E4%B8%806.8a-4a%E5%B9%B3%E6%96%B9-4)
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
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