How do you simplify $[(3a + 4b)2]-5$ ?

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Answer 1 · 2017-02-26T20:03:55

First, expand the term within parenthesis by multiplying by the term outside the parenthesis, $color(red)(2)$ :

$[(3a + 4b)color(red)(2)] - 5 ->$

$[(color(red)(2) xx 3a) + (color(red)(2) xx 4b)] - 5 ->$

$[6a + 8b] - 5 ->$

We can now remove the brackets to give:

$6a + 8b - 5$

How do you simplify [(3a + 4b)2]-5[(3a + 4b)2]-5?