(2|a+b|+3|a-b|-|b|):(|a+b|^2) a=-1 b=-3

Question

(2|a+b|+3|a-b|-|b|):(|a+b|^2)
a=-1
b=-3

Answer 1

( 2 | a + b | + 3 | a - b | - | b| ) : ( | a + b |^2) = ( 2 | -1 -3 | + 3 | -1 + 3| - 3) : ( | -1 -3|^2)
= ( 2 * 4 + 3 * 2 - 3) : 16 = ( 8 + 6 - 3) : 16 = 11/16