-1x^2 - 15x - 54 = 0
-1(x^2 +15x+54)=0
-1( x )(x ) ( +6)( +9)=0
-1(x+6) (x+9) = 0
Solve:
-1(x+6)=0
-1(x) (-1)(+6)=0
-1x-6=0
-1x-6+6=0+6
-1x=6
-1x/-1=6/-1
x=-6
Solve:
-1(x+9) = 0
-1(x) (-1)(+9) = 0
-1x-9=0
-1x-9+9=0+9
-1x=9
-1x/-1=9/-1
x=-9