how to factorize x square - y +xy-x
Last edited by jeev@; Jul 24th 2008 at 05:20 AM. Reason: i got the right answer
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Selamat malam Originally Posted by jeev@ how to factorize x square - y +xy-x x²-y+xy-x Rearrange this : =x²+xy-x-y =x(x+y)-(x+y) =(x+y)(x-1) Does it look clear to you ?
9a square +12ab+4b square
Originally Posted by jeev@ 9a square +12ab+4b square Recall the identity (x+y)²=x²+2xy+y² 9a²+12ab+4b²=(3a)²+2*(6ab)+(2b)²
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