Question

2x ao quadrado - 5x = -2

Answer 1

2x² -5x+2=0

Delta= 25-16
Delta= 9
X= 5 +-3/4
x'=8/4=2
x"=2/4=1/2

Answer 2

2x² - 5x = -2
2x² - 5x + 2 = 0
Aplicando Bháskara:
Δ = (-5)² - 4.2.2
Δ = 25 - 16
Δ = 9 ⇒ √Δ = 3

$x'= \frac{-(-5)+3}{2.2}= \frac{5+3}{4}= \frac{8}{4}=2 \\ \\ x''= \frac{5-3}{2.2}= \frac{2}{4}= \frac{1}{2}$

Abraço!