Question

Which expression gives the solutions to the equation 2x^2 + 5x – 10 = 0?

Answer 1

D.

Explanation:

The formula to find the solutions of a quadratic equation is -b plus or minus the square root of b^2 - 4ac divided by 2a. In this case, a = 2, b = 5, and c = -10.

`(-b +-√(b^2 - 4ac) )/(2a)`

=
`(-5 +-√(5^2 - 4*2*-10) )/(2 * 2)`

So, the right answer should be the choice on the lower right corner.

Hope this helps!