Question

(2x-3)² -4 (x-1). (x+1)+5

Answer 1

(4x+9)-4x+4.1x+5
13x-4x+4x+5
13x+5
18x

Answer 2

(2x-3)^2-4.(x-1).(x+1)+5
2x^2-2.2x.3+3^2-4.(x-1).(x+1)+5
4x^2-12x+9-4.(x^2+x-x-1)+5
4x^2-12x+9-4x^2+4+5
-12x+9+4+5
-12x+18=0
-12x=0-18
-12x=-18.(-1)
12x=18
x=18/12
x=1,5