Question

A maior raiz da equaçao -2x²+3x+5=0 é?
a) -1
b) 1
c) 2
d) 2,5
e)3+√19

Answer 1

Ola Larissa

2x² - 3x - 5 = 0

delta
d² = 9 + 40 = 49
d = 7

x1 = (3 + 7)/4 = 5/2 (D) 
x2 = (3 - 7)/4 = -1