(x-2)2 -5 (x-3)(x+3)+4 (x-1)(x+4)=1

Question

(x-2)2 -5 (x-3)(x+3)+4 (x-1)(x+4)=1

Answer 1

2x-4-5x2+45+4x2+12x-16=1
-x2+14x+24=0
x2-14x-24=0
D=196+96=292
x=(14+-k292)/2
x1=7+k73
x2=7-k73