How do you multiply $(8k - 7) ( - 5k - 3)$ ?

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Answer 1 · 2018-03-27T13:57:22

$-40k^2+11k+21$

$(8k-7) (-5k-3)$

$=8k×(-5k) + 8k×(-3) -7×(-5k)-7×(-3)$

$=-40k^2-24k+35k+21$

$=-40k^2+11k+21$

How do you multiply (8k - 7) ( - 5k - 3)(8k - 7) ( - 5k - 3)?