Question

Solve for Quadratic Equations
10x2 + 20x− 71 = 9

Answer 1

x=2 or x=-4. You can also write it as x=2,-4

Explanation:

Write your equation and start by subtracting 9 from both sides

10x^2+20x-71-9=9-9

You should end up with

10x^2+20x-80=0

For this equation: a=10, b=20, c=-80

Now we use the quadratic formula and substitute the information. I have attached a picture for you.