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for example

x2- 16 factors out to be (x+4)(x-4)

x2- 25= (x+5)(x-5)

x2 - 36= (x+6)(x-6)

its as easy as that, but it doesnt work if the problem is like x2 + 36... it has to be minus-thats why there are only two terms, because if you foil it out, it canceles out the middle term

hopefully that made sense

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16y ago

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