Question

Quais sao as raizes da equaçao x2+3x-28=0

Answer 1

x²+3x-28=0

Δ=b²-4ac

Δ=9-4.1.(-28)

Δ=9+112

Δ=121

x=-3+√121/2        x=-3+11/2        x=8/2        x=4

x=-3-11/2          x=-14/2           x=-7

Answer 2

∆=9 - 4. (-28)
∆= 121

x = -3+- 11 /2
x=4 ou x= -7