How do you solve 0=4x^2 + 16x + 15?

Aug 16, 2015

Transformed equation$y ' = {x}^{2} + 16 x + 60.$ (2)
Back to original equation (1), the 2 real roots are: $x 1 = - \frac{6}{4} = - \frac{3}{2}$, and $x 2 = - \frac{10}{4} = - \frac{5}{2}$.