algebra need to get help

Algebra
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(y2)-4

Nov 17th, 2014

To factorize y^2 -4, we basically have two sets of brackets with the same terms except for a difference in signs

(y+2)(y-2)

When we open the brackets we get  y^2+2y -2y -4 = y*2 -4 as required

Nov 17th, 2014

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Nov 17th, 2014
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Nov 17th, 2014
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