Помогите с уравнениями

1) x+10 (x-6) - (x-1) (x+1) = 1

2) (x-4) (x-6) - (x-2) (x+2) = - 2

3 (x-5) (x+8) - (x-7) (x+7) = 3

1) x+10x-60 - (x²-1) = 1

x+10x-60-x²+1=1

-x²+11x-60=0

x²-11x+60=0

D=121-240=-119

Ne imeet rešenie v R.

2) (x-4) (x-6) - (x-2) (x+2) = - 2

x²-10x+24-x²+4=-2

-10x=-30

x=3

3) (x-5) (x+8) - (x-7) (x+7) = 3

x²+3x-40-x²+49=3

3x+9=3

3x=-6

x=-2

1) Ecli zadanie (x+10) (x-6) - (x-1) (x+1) = 1, to

x²+4x-60-x²+1=1

4x=60

x=15