Question

menos 2X ao quadrado + 10x = 0

Answer 1

-2x^2 + 10x = 0

Faturando:

x(-2x + 10) = 0

x' = 0

-2x + 10 = 0
-2x = -10(-1)
2x = 10
x = 10/2
x" = 5

S={0, 5}