Find the following product. (5s - 4)(6s +6)

Find the following product.
$\left(5s-4\right)\left(6s+6\right)$
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Kiera Moreno
Find the following product
$\left(5s-4\right)\left(6s+6\right)$
we can rewrite is
$=\left(58s\right)\left(65+6\right)-4\left(6s+6\right)\phantom{\rule{0ex}{0ex}}=3{s}^{2}+30s-\left(4\right)\left(6s\right)-4\left(6\right)\phantom{\rule{0ex}{0ex}}=30{s}^{2}+30s-24s-24\phantom{\rule{0ex}{0ex}}\left(5s-4\right)\left(6s+6\right)={s}^{2}+\frac{1}{5}s-\frac{4}{5}$