How do you multiply $(x^2-7y)^2$ ?

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Answer 1 · 2016-11-07T15:21:49

#x^4 - 14yx^2 + 49y^2

$(x^2 - 7y)^2 =>$

$(x^2 - 7y)(x^2 - 7y) =>$

$x^2x^2 - x^2(7y) - x^2(7y) + 7y7y =>$

$x^4 - 2*(7yx^2) + 49y^2 =>$

$x^4 - 14yx^2 + 49y^2$

How do you multiply (x^2-7y)^2(x^2-7y)^2?