Question

resolva 13 -2x -15x²=0

Answer 1

Resposta:

a = -15; b = -2 e c = 13
-15x² -2x + 13 = 0
15x² + 2x - 13 = 0
(-2 ±√784) / 30
(-2 ± 28) /30
x' = 26 / 30
x' = 13 / 15
x'' = -30 / 30
x'' = -1