分解因式 ①a的五次方-a ②1-4x的平方-4y的平方+8xy ③(x+2)(x+3)+x的平方-4
④x(y-x)-y(x-y)-(x-y)的平方⑤2x的二次方+2x+½⑥(a-b(3a+b)的平方+(b-a)⑦(x的平方-1)的平方-6(x的二次方-1)...
④x(y-x)-y(x-y)-(x-y)的平方
⑤2x的二次方+2x+½
⑥(a-b(3a+b)的平方+(b-a)
⑦(x的平方-1)的平方-6(x的二次方-1)+9
求详细过程 有详细过程的解
⑥(a-b)(3a+b)的平方+(b-a) 展开
⑤2x的二次方+2x+½
⑥(a-b(3a+b)的平方+(b-a)
⑦(x的平方-1)的平方-6(x的二次方-1)+9
求详细过程 有详细过程的解
⑥(a-b)(3a+b)的平方+(b-a) 展开
1个回答
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①.a^2 - a = a(a^4 - 1) = a(a^2 + 1)(a^2 - 1) =a(a+1)(a-1)(a^2 + 1)
②蔽老拍.1 - 4x^2 - 4y^2 + 8xy = 1 - (4x^2 - 8xy + 4y^2) = 1 - (2x-2y)^2 = [1+(2x-2y)][1-(2x-2y)]
=(1+2x-2y)(1-2x+2y)
③.(x+2)(x+3) + x^2 - 4 = (x+2)(x+3) + (x+2)(x-2) = (x+2)[(x+3)+(x-2)] =(x+2)(2x+1)
④.x(y-x) - y(x-y) - (x-y)^2 = -x(x-y) - y(x-y) - (x-y)^2 = (x-y)[-x-y-(x-y)] =-2x(x-y)
⑤.2x^2 + 2x + 1/2 = 2[x^2 + x + (1/4)] =2[x+(1/2)]^2
⑥.(a-b(3a+b)宏羡的含祥平方+(b-a)什么意思?看不懂。
⑦.(x^2 - 1)^2 - 6(x^2 - 1) + 9 = [(x^2 - 1) - 3]^2 = (x^2 - 4)^2 =(x+2)^2 * (x-2)^2
②蔽老拍.1 - 4x^2 - 4y^2 + 8xy = 1 - (4x^2 - 8xy + 4y^2) = 1 - (2x-2y)^2 = [1+(2x-2y)][1-(2x-2y)]
=(1+2x-2y)(1-2x+2y)
③.(x+2)(x+3) + x^2 - 4 = (x+2)(x+3) + (x+2)(x-2) = (x+2)[(x+3)+(x-2)] =(x+2)(2x+1)
④.x(y-x) - y(x-y) - (x-y)^2 = -x(x-y) - y(x-y) - (x-y)^2 = (x-y)[-x-y-(x-y)] =-2x(x-y)
⑤.2x^2 + 2x + 1/2 = 2[x^2 + x + (1/4)] =2[x+(1/2)]^2
⑥.(a-b(3a+b)宏羡的含祥平方+(b-a)什么意思?看不懂。
⑦.(x^2 - 1)^2 - 6(x^2 - 1) + 9 = [(x^2 - 1) - 3]^2 = (x^2 - 4)^2 =(x+2)^2 * (x-2)^2
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