Answer
-7
Work Step by Step
Using order of operations, first solve numerator and denominator separately, then simplify the fraction.
$\frac{-20 + (-4)^{2}(3)}{1 - 5} = \frac{-20 + (16)(3)}{1 - 5} = \frac{-20 + 48}{1 - 5} = \frac{28}{1 - 5} = \frac{28}{-4} = -7$