How do you use the distributive property to factor $21 b - 15 a$ $21b-15a$ ?

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Answer 1 · 2017-03-25T18:06:43

See the solution process below:

First, factor a $3$ $color(red)(3)$ from each term and rewrite the expression as:

$(3 \cdot 7 b) - (3 \cdot 5 a)$ $(color(red)(3) * 7b) - (color(red)(3) * 5a)$

Now, factor the $3$ $color(red)(3)$ out of both terms:

$3 (7 b - 5 a)$ $color(red)(3)(7b - 5a)$

How do you use the distributive property to factor 21b−15a21b-15a?