Question

cum se rezolva exercitiul acesta (X+1) (X+2) +18=(X+3) (X+4)

Answer 1

$\displaystyle (x+1) (x+2) +18=(x+3) (x+4) \\ x^2+2x+x+2+18=x^2+4x+3x+12 \\ x^2+2x+x-x^2-4x-3x=12-2-18 \\ -4x=-8 \\ x= \frac{-8}{-4} \\ x=2$