Question

Resolva a conta a seguir

Answer 1

x² -11x +18 = 0
Δ = b² -4.a.c
Δ = (-11)² -4.1.18
Δ = 121 -72
Δ = 49

x = -b +- √Δ / 2.a
x = 11 +- 7 / 2

x' = 11+7 / 2
x' = 18/2
x' = 9

x'' = 11-7 / 2
x'' = 4/2
x'' = 2

Resposta: x = 9 e 2