Question

quanto que da essa conta ?
x ao quadrado -135x+1800=0

Answer 1

x² - 135x + 1800 = 0
a= 1, b=-135, c= 1800
Δ = b² - 4ac
Δ = (-135)² - 4 * 1 * 1800
Δ =18225 - 7200
Δ = 11025

x = -b +/- √Δ / 2a
x' = 135 + √11025 / 2 * 1
x' = 135 + 105 / 2
x' = 240 / 2
x' = 120

x" = 135 - 105 / 2
x" = 30 / 2
x" = 15