Which of the following is a solution of 4x2 = - 9x - 4? a. (9±√17)/8
b. (-9±√145)/8 c. (9±√145)/8 d. x - (-9±√17)/8

The answer is (-9±√17)/8

This is example of quadratic equation:
ax² + bx + c = 0
which solutions are:


Our equation 4x² = - 9x - 4 can be expressed as 4x² + 9x + 4 = 0, from which we can conclude that:
a = 4,
b = 9
c = 4
So, let's just implement that in the solution of the general quadratic equation: