Answer:
x_1=-9 , x_2=6
Step-by-step explanation:
y=x^2+3x-54
0=x^2+3x-54
x^2+3x-54=0
x^2+9x-6x-54=0
xTimes(x+9)-6x-54=0
xTimes(x+9)-6(x+9=0
(x+9)x(x-6)=0
x+9=0
x-6=0
x=-9
x=6
