Question

resolva a equaçao do 2 grau em r : x2+x-6=0

Answer 1

 x²+x-6 = 0Δ = b² - 4.a.c
Δ = 1 - 4.1.(-6)
Δ = 25
 -b +- √Δ/2.a
-1 +- √25 /2.1
-1 +- 5 / 2
x' = (-1 + 5)/2 = 4 / 2 = 2
x'' = (-1 - 5)/2 = -6 / 2 = -3