How do you multiply $(3 m - 1) (8 m + 7)$ $(3m-1) (8m+7)$ ?

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Answer 1 · 2015-07-20T15:05:12

$= 24 m^{2} + 13 m - 7$ $=24m^2 +13m -7$

$(3 m - 1) (8 m + 7)$ $color(green)((3m−1))(8m+7)$

$= (3 m) (8 m + 7) - 1 (8 m + 7)$ $=color(green)((3m))(8m+7)−color(green)(1) (8m+7)$

$= 24 m^{2} + 21 m - 8 m - 7$ $=24m^2 +21m -8m -7$

$= 24 m^{2} + 13 m - 7$ $=24m^2 +13m -7$

How do you multiply (3m-1) (8m+7)(3m−1)(8m+7)(3m-1) (8m+7)?