Question

Quero saber como faz essas contas ...
(3a+4b)² =
(6a+4b)²=
(5p+6g)²=
(8x+7y)²=

Answer 1

$(3a + 4b)^2 \\ \\ (3a + 4b) *(3a + 4b) \\ \\ \\ 9a^2 + 12ab + 12ab + 16b^2 \\ \\ => 9a^2 + 24ab + 16b^2$

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$(6a + 4b)^2 \\ \\ (6a + 4b)* (6a + 4b) \\ \\ 36a^2 + 24ab + 24ab + 16a^2 \\ \\ => 36a^2 + 48ab + 16b^2$

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$(5p + 6g)^2 \\ \\ (5p + 6g)*(5p + 6g) \\ \\ 25p^2 + 30pg + 30pg + 36g^2 \\ \\ => 25p^2 + 60pg + 36g^2$

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$(8x + 7y)^2 \\ \\ (8x + 7y) *(8x + 7y) \\ \\ 64x^2 + 56xy + 56xy + 49y^2 \\ \\ => 64x^2 + 112xy + 49y^2$