Question

4x^2+2x-1=0 in quaratic equations

Answer 1

Explanation:

"quaratic" should be "quadratic."

The coefficients of this quadratic are 4, 2 and -1. Thus, the discriminant is

b^2 - 4ac, or here, 4 - 4(4)(-1) = 20

Since the discriminant is positive, our quadratic has two real, different roots.

-2 ± (√4)(√5)

The roots are: x = ---------------------

2(4)

-1 ± √5

This reduces to x = ---------------

8