Question

What is the value of b2 - 4ac for the following equation?

x 2 + 5x + 4 = 0

Answer 1

9

Explanation:

This equation is in the form

ax²+bx+c = 0

Substituting our values for a, b and c in,

5²-4(1)(4) = 25-16 = 9

Answer 2

`b^2-4ac=5^2-4\cdot1\cdot4=25-16=9`