Question

Find the value of b – 4ac if a=2,b= –8,c=5​

Answer 1

Answer:

b-4ac

= -8-4×2×5

=-48

The answer to the question is - 48

Answer 2

Answer:

$a = 2 \\ b = - 8 \\ c = 5 \\ \\ b - 4ac \\ ( - 8) - 4(2)(5) \\ = - 8 - 40 \\ = \: \underline{ \underline{- 48}}$