Question

como resolver x²-38x-480=0 rápido

Answer 1

$Delta=B^{2}-4ac \\ Delta-3 8^{2} +1920 \\ Delta=1444-1920 \\ Delta=3364 \\ \\ \frac{-b +- \sqrt{Delta} }{2.a} \\ \\ \frac{38+58}{2.1} =96/2= 48 \\ \\ \frac{38-58}{2.1} = -20/2=-10 \\ \\ \boxed{S=48 \ e-10}$

Answer 2

x² - 38x - 480 = 0
Δ = b² - 4 . a . c
Δ = (- 38)² - 4 . 1 . (- 480)
Δ = 1444 + 1920
Δ = 3364

x = - b ± √Δ/2 . a
x = - (- 38) ± √3364/2 . 1
x = 38 ± 58/2

x' = 38 + 58/2
x' = 96/2
x' = 48

x'' = 38 - 58/2
x'' = - 20/2
x'' = - 10