-1x^2 - 4x + 45 = 0

-1(x^2 + 4x - 45 )= 0

-1(x )(x ) ( -5)( +9)=0

-1(x-5) (x+9) = 0

Solve:

-1(x-5)=0

-1(x) (-1)(-5)=0

-1x+5=0

-1x+5-5=0-5

-1x=-5

-1x/-1=-5/-1

x=5

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