Question

a equaçao x^2-3×-10=0 adimite a raiz:

Answer 1

x² - 3x - 10 = 0
a = 1
b = -3
c = -10

Δ=b² - 4ac
Δ=(-3)² - 4.(1).(-10)
Δ=9 + 40
Δ= 49

x = -b +- √Δ / 2a
x = 3 +- 7 / 2

x' = 3 + 7 / 2
x' = 5

x'' = 3 - 7 / 2
x'' = -2