Question

(X-3)×(x+2)=0 quak o conjunto da solucao?

Answer 1

(x - 3) * (x + 2) = 0
x² + 2x - 3x - 6 = 0
x² -x - 6 = 0

a = 1
b = -1
c = -6


Δ = b² - 4ac
Δ = (-1)² - 4 * 1 * (-6)
Δ = 1 + 24
Δ = 25


x' = -b ± √Δ / 2a
x' = - (-1) ± √25 / 2
x' = 1 + 5/2
x' = 6/2
x' = 3


x" = 1 - 5/2
x'' = -4/2
x'' = -2


S = {3, -2}