Question

x(x+2)-(x-3)=7(помогите)

Answer 1

x²+2x-x+3=7
x²+x-4=0
D=b²-4ac=1-4*1*(-4)=16 D>0
x1=-1+√16-------2*1=1,5
x2=-1-√16-------2*1=2,5