Question

(х+12)²=х(х+8) и (х-3)(х+1)=(х-2)²

Answer 1

1. x²+16x+144=x²+8x
    x²-x²-8x+16x=-144
    8x=-144
    x=-18
2. x²+x-3x-3=x²-4x+4
    x²-x²-3x+4x=4+3
    x=7