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Math

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What is the answer and solution for this (4x-3y)(4x+3y)=

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Gillierviz Gillierviz

answer 16x^2-9y^2
solution
4x*4x = 16x^2
4x*3y=12xy
-3y*4x=-12xy
3y*-3y=-9y^2
12xy and -12xy are cancelled

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