-1x^2 + 6x + 16 = 0
-1( x^2 - 6x - 16) = 0
-1(x )(x ) ( -8)( +2)=0
-(x-8) (x+2) = 0
Solve:
-1(x-8)=0
-1(x) (-1)(-8)=0
-1x+8=0
-1x+8-8=0-8
-1x=-8
-1x/-1=-8/-1
x=8
Solve:
-1(x+2) = 0
-1(x) (-1)(+2) = 0
-1x-2=0
-1x-2+2=0+2
-1x=2
-1x/-1=2/-1
x=-2