作业帮(x+2y)^2-(2x-y)^2 还有9（2x-y）^2-4(x+2y)^2
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(x+2y)^2-(2x-y)^2 还有9（2x-y）^2-4(x+2y)^2
(x+2y)^2-(2x-y)^2
还有9（2x-y）^2-4(x+2y)^2
(x+2y)^2-(2x-y)^2 还有9（2x-y）^2-4(x+2y)^2
是因式分解吗?
1、
原式=[(x+2y)-(2x-y)]*[(x+2y)+(2x-y)]
=(3y-x)(3x+y)
2、
原式=[3(2x-y)-2(x+2y)]*[3(2x-y)+2(x+2y)]
=(4x-7y)(10x+y)
1.原式=[(x+2y)-(2x-y)]*[(x+2y)+(2x-y)]
=(3y-x)(3x+y)
2、
原式=[3(2x-y)-2(x+2y)]*[3(2x-y)+2(x+2y)]
=(4x-7y)(10x+y)
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