因式分解(1)2ax-10ay+5by-bx(2)x²+xy+bx+ax+by+ay(1)x²+3x-4

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因式分解(1)2ax-10ay+5by-bx(2)x²+xy+bx+ax+by+ay(1)x²+3x-4
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因式分解(1)2ax-10ay+5by-bx(2)x²+xy+bx+ax+by+ay(1)x²+3x-4
因式分解(1)2ax-10ay+5by-bx(2)x²+xy+bx+ax+by+ay(1)x²+3x-4

因式分解(1)2ax-10ay+5by-bx(2)x²+xy+bx+ax+by+ay(1)x²+3x-4
(1)2ax-10ay+5by-bx
=(2a-b)x -5(2a-b)y
=(2a-b)(x-5y)
(2)x²+xy+bx+ax+by+ay
=x(x+y)+(a+b)(x+y)
=(x+a+b)(x+y)
(1)x²+3x-4
十字相乘法:
1 -1
×
1 4
=(x-1)(x+4)

(1)=2a(x-5y)-b(x-5y)=(x-5y)(2a-b)
(2)=x(x+a+b)+y(x+a+b)=(x+y)(x+a+b)
(3)=(x+4)(x-1)