Question

x2 +15x +9=0 na forma de baskera

Answer 1

X² +15x +9=0
x = -15 +- √Δ/2
Δ = 15² - 4.9
Δ = 225 - 36
Δ= 189
x = -15 +- √189/2
x = -15 +- 3√21/2
x' = -15 + 3√21/2
x" = -15 - 3√21/2