Question

x2-8x+15=0 preciso dessa resposta agora!

Answer 1

x^2-8x+15=0
delta=b^2-4.a.c
delta=(-8)^2-4.1.15
delta=64-60
delta=4
x=-b-/ raiz de delta/2a
x=-(-8)-2/2.1
x=8-2/2
x=6/2
x=3
x=-(-8)+2/2.1
x=8+2/2
x=10/2
x=5