Factor polynomial $$ 10ab+15b-2a-3 $$
Answer
$$ 10ab+15b-2a-3 = (5b-1)(2a+3) $$
Explanation
To factor $ 10ab+15b-2a-3 $ we can use factoring by grouping.
Group $ \color{blue}{ 10ab }$ with $ \color{blue}{ 15b }$ and $ \color{red}{ -2a }$ with $ \color{red}{ -3 }$ then factor each group.
$$ \begin{aligned} 10ab+15b-2a-3 &= ( \color{blue}{ 10ab+15b } ) + ( \color{red}{ -2a-3 }) = \\ &= \color{blue}{ 5b( 2a+3 )} \color{red}{ -1( 2a+3 ) } = \\ &= (5b-1)(2a+3) \end{aligned} $$This page was created using
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