Factor and solve : -1x^2 + 1x + 42 = 0

-1x^2 + 1x + 42 = 0

-1(x^2-x-42)=0

-1(x )(x ) ( -7)( +6)=0

-1(x-7) (x+6) = 0

Solve:

-1(x-7)=0

-1(x) (-1)(-7)=0

-1x+7=0

-1x+7-7=0-7

-1x=-7

-1x/-1=-7/-1

x=7

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