(x+y)²+4(x+y)-5(2a+b)²-4(2a+b)+36y²-11xy-10x²ax²-a³-2ax——2a²
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/24 18:59:01
![(x+y)²+4(x+y)-5(2a+b)²-4(2a+b)+36y²-11xy-10x²ax²-a³-2ax——2a²](/uploads/image/z/1851530-50-0.jpg?t=%28x%2By%29%26%23178%3B%2B4%28x%2By%29-5%EF%BC%882a%2Bb%29%26%23178%3B-4%282a%2Bb%29%2B36y%26%23178%3B-11xy-10x%26%23178%3Bax%26%23178%3B-a%26%23179%3B-2ax%E2%80%94%E2%80%942a%26%23178%3B)
(x+y)²+4(x+y)-5(2a+b)²-4(2a+b)+36y²-11xy-10x²ax²-a³-2ax——2a²
(x+y)²+4(x+y)-5
(2a+b)²-4(2a+b)+3
6y²-11xy-10x²
ax²-a³-2ax——2a²
(x+y)²+4(x+y)-5(2a+b)²-4(2a+b)+36y²-11xy-10x²ax²-a³-2ax——2a²
(x+y)²+4(x+y)-5
=(x+y+5)(x+y-1)
(2a+b)²-4(2a+b)+3
=(2a+b-3)(2a+b-1)
6y²-11xy-10x²
=(2y-5x)(3y+2x)
ax²-a³-2ax——2a²
=a(x²-a²)-2a(x+a)
=a(x+a)(x-a)-2a(x+a)
=a(x+a)(x-a-2)
.十字相乘法
1.=(x+y+5)(x+y-1)
2.=(2a+b-3)()2a+b-1
3.=(2y-5x)(3y+2x)
4.ax²-a³-2ax-2a²
=ax²-a³-(2ax+2a²)
=a(x²-a²)-2a(x+a)
=a(x+a)(x-a)-2a(x+a)
=a(x+a)(x-a-2)