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