Question

Determine as raizes
2x²+2x-24=0

Answer 1

b) 2x² + 2x - 24 = 0 (:2)
x² + x - 12 = 0 <<<<<<<<<<<<<<<<
Delta = b² - 4ac
Delta = 1 - 4(1)(-12)
Delta = 1 + 48
Delta = 49

X = (-b +- raiz delta) / 2a
X = (-1 +- 7) / 2
x' = 6/2 = 3
x" = -8/2 = -4