Question

x(x+2)=3 помогите решить

Answer 1

x²+2x=3
x²+2x-3=0
D = 4-4*1* (-3) = 4-4 * (-3) = 4+12 = 16
x1 = -2+4/2 = 1
x2 = -2-4/2 = -3
Ответ = 1 и -3