Question

What is the value of b2 - 4ac for the following equation? 2x 2 - 2x - 1 = 0

Answer 1

For you to make an equation a quadratic equation, you need everything to be on one side, so you add one to both sides. 

2x^2 + 3x + 0=0 

a=2, b=3, c=0 

b^2-4ac (In the next step just plug in your variables) 

3^2 - 4(2)(0) 

9 - 8(0) 

9 - 0 

Your answer=9