selesaikan x2+10x+21=0

Mapel MM
x^2+10x+21=0
x^2+10x =-21
x^2+x =-31
2x^2 =-31
x^2 =-31/2
x =akar 15,5
x =3,93
x = 4
semoga membantu

x^2+10+21=0
(x+7) (x+3)
x=-7 x=-3