(5x-3)^2=(2x+1)^2 5x-3=2x+1或5x-3=-2x-1 3x=4或7x=2 x=4/3或x=2/7 3(x+3)^2=x^2+x 3x²+18x+27=x²+x 2x²+17x+27=0 x²+17x/2+289/16=73/16 (x+17/4)²=73/16 x=-17/4+√73/4 或x=-17/4-√73/4
