Question

$\frac{x^2+28}{6} = \frac{7x}{3} - \frac{x}{2}$ é:

Answer 1

faz mmc
x²+28 = 14x - 3x
x² + 28 = 11x
x² - 11x + 28=0
Δ = (-11)² - 4 . 1 . 28
Δ= 121 - 112
Δ=9

x= -(-11)+ou-√9
          2.1
x = 11+ou-3
           2
x' = 14/2 = 7
x'' = 8/2 = 4