4x²+9x-9=0 help me народ

Question

4x²+9x-9=0 help me народ

Answer 1

D=9^2-4*4*(-9)=81+144=225; x1=(-9-15)/8, x2=(-9+15)/8. x1= -3, x2=3/4. ответ: x1= -3, x2=3/4.