# How do you evaluate (3- 4b ) ( 2( - 3) + 5a ) if a=-1, b=-2?

Jan 30, 2017

Answer is $- 121$

#### Explanation:

Substitute in the given values and you will get the answer
by putting given values of a and b

$= \left\{3 - 4 \left(- 2\right)\right\} \left\{2 \left(- 3\right) + 5 \left(- 1\right)\right\}$

$= \left\{3 - 4 \left(- 2\right)\right\} \times \left\{2 \left(- 3\right) + 5 \left(- 1\right)\right\}$

$= \left\{3 + 8\right\} \times \left\{- 6 - 5\right\}$

$= 11 \times - 11 = - 121$