Question

calculati ecuatia x la patrat +3x-54=0

Answer 1

$x^{2}+3x-54=0$

Δ(delta) =$b^{2}-4ac=9-4*1*(-54)=9+216=225$

$x_1=\frac{-b+\sqrt{delta} }{2a}=\frac{-3+15}{2}=\frac{12}{2}=6$

$x_2=\frac{-b-\sqrt{delta} }{2a}=\frac{-3-15}{2}=\frac{-18}{2}=-9$