Question

determine as raizes das funçoes f(x)2x²-5x-3

Answer 1

$2x^2-5x-3 = 0 \\ A = 2 ; B = -5 ; C = -3 \\ \\ DELTA = b^2 - 4*a*c \\ DELTA = (-5)^2 - 4 * 2 * (-3) \\ DELTA = 25 + 24 \\ DELTA = 49 \\ \\ X = \frac{-b +- \sqrt{DELTA}}{2*a} \\ X = \frac{5 +- 7}{4} \\\\ X' = \frac{12}{4} = 3 \\ X'' = \frac{-2}{4} = \frac{-1}{2}$