Question

qual a soma das raizes da equaçao ×2-10+9=0

Answer 1

x²-10+9=0

Δ= (-10)² - 4* 1 * 9
Δ= 100 - 36
Δ= 64

x¹ = $\frac{-(-10)+ 8}{2*1}$
x¹ = $\frac{18}{2}$
x¹ = 9

x² = $\frac{-(-10) -8 }{2*1}$
x² = $\frac{2}{2}$
x² = 1


Resposta: 9+1=10