Question

X²-14x+49=0
Preciso resolver

Answer 1

x^2-14x+49=0

Δ=b^2-4ac

Δ=(-14)^2-4.1.49

Δ=196-196

Δ=0

x=-b+-vΔ/2a

x=-(-14)+-0/2

x'=14/2=7

x"=14/2=7

S={7, 7}