Question

2y^2+2y=24 calcular na fórmula de bhaskara

Answer 1

2y^2+2y=24 (:2)
y^2 + y = 12
y^2 + y - 12 = 0
a = 1, b = 1; c = - 12
∆= b^2-4ac
∆ = 1^2 - 4.1(-12)
∆ = 1 + 48
∆ = 49

x = [ - b +/- √∆]/2a
x = [ - 1 +/- √49]/2.1
x = [ - 1 +/- 7]/2

x' = [ - 1 - 7]/2 = -8/2 = - 4
x" = [- 1 + 7]/2 = 6/2 = 3

R.: ( - 4 , 3 )