Question

Consider the quadratic equation below.

Answer 1

You are given the quadratic 4x^2 - 5 = 3x + 4. You cannot apply the quadratic formula until this has been rewritten in the form y = ax^2 + bx + c. After re-arranging the terms, we get

4x^2 - 3x - 9 = 0. Then a=4, b= -3 and c= -9.

Then:
3 plus or minus sqrt(9-4(4)(-9)
x = ------------------------------------------
2(4)

Answer 2

The right answer is the 2nd one.

It's using the quadratic equation