Solve the equation using the quadratic formula.
x^2 + 3x -2 = 0
question options:

x = −3±√17/2

x =−2±√17/3

x = −2±√29/4

x = 3±√11/2

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b