Question

equaçao do 2 grau 9x2+12x-5=0

Answer 1

9x^2 + 12x - 5 = 0
x = - 12 +- 18/18
x' = 1/3
x" = - 5/3

S = { 1/3 ; - 5/3 }

Answer 2

Δ
9x² + 12x - 5 = 0
a = 9, b = 12, c = -5

Δ = b²-4ac
Δ = 12²-4*9*(-5)
Δ = 144 + 180
Δ = 324

x = (-b+-√Δ)/2a
x = (-12+-√324)/2*9
x = (-12+-18)/18

x' = (-12+18)/18
x' = -6/18 ou -1/3

x'' = (-12-18)/18
x'' = -30/18
x'' = -5/3