Question

因式分解几道题目

2a（x+y）-6（x+y）因式分解
-6x的3次方+36x的2次方-6x 因式分解
5（x-y）的3次方+10（x-y）的2次方

Answer 1

2a（x+y）-6（x+y)
=2(x+y)(a-3)

-6x的3次方+36x的2次方-6x
=-6x^3+36x^2-6x
=-6x(x^2-6x+1)

5（x-y）的3次方+10（x-y）的2次方
=5(x-y)^3+10(x-y)^2
=-5(x-y)^2(x-y-2)

提示:运用提取公因式法

Answer 2

2(X+y)(a-3)
6x(-x的平方+6X-1)
5(x-y)的2次方(1+2)

Answer 3

2a（x+y）-6（x+y)
=2(x+y)(a-3)

=-6x^3+36x^2-6x
=-6x(x^2-6x+1)

=5(x-y)^3+10(x-y)^2
=-5(x-y)^2(x-y-2)

Answer 4

2a（x+y）-6（x+y)
=2(x+y)(a-3)

-6x的3次方+36x的2次方-6x
=-6x^3+36x^2-6x

=-6x(x^2-6x+1)

5（x-y）的3次方+10（x-y）的2次方
=5(x-y)^3+10(x-y)^2
=-5(x-y)^2(x-y-2)