Question

me ajudem calcule a raiz dessa equação 7x²=-14x

Answer 1

7x^2=-14x
7x^2+14x=0
delta=b^2-4.a.c
delta=14^2-4.7.0
delta=196-0
delta=196
x=-b-/+ raiz de delta / 2a
x=-14-14/2.7
x=-28/14
x=-2
x=-14+14/2.7
x=0/14
x=0