Question

calcule os polinomios (6x-y)2

Answer 1

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$(6x-y)^2= \\ \\ (6x)^2-2.6x.y+y^2= \\ \\ 36x^2-12xy+y^2$

Answer 2

$(6x - y)^2 \\ \\ \\ (6x - y)(6x - y) \\ \\ \\ 36x^2 - 6xy - 6xy + y^2 \\ \\ \\ => 36x^2 - 12xy + y^2$