Question

(3x+6)²=100помогите пожалуйста

Answer 1

(3×+6)^2=100
9×^2+36×+36-100=0
9×^2+36×-64=0
D=1296+4 × 9×64=3600
×1=(-36-60)/18=96/18=48/9
×2=(-36+60)/18=24/18=12/9