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May 7, 2015

Homework Help: maths

Posted by sydney on Thursday, December 21, 2006 at 2:50am.

how do i change x^2-4x-32=0 into (x+4)(x-8)=0

x^2-4x-32=0
=> x^2-8x+4x-32=0
=> x(x-8)+4(x-8)=0
=> (x-8)(x+4)=0
OR (x+4)(x-8)=0

X2 -4x -32 = 0
JUst factor it. It factors into
(X-8)(X+4)=0

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