Como Resolver x² + x -7 = 5
Respostas
1
x² + x – 7 – 5 = 0
x² + x – 12 = 0
Δ = 1² – 4.1.(-12)
Δ = 1+ 48
Δ = 49
x’ = -1 + √49/2.1
x’ = -1 + 7/2
x’ = 3
x” = -1 – √49/2.1
x” = -1 – 7/2
x” = -4
x² + x – 12 = 0
Δ = 1² – 4.1.(-12)
Δ = 1+ 48
Δ = 49
x’ = -1 + √49/2.1
x’ = -1 + 7/2
x’ = 3
x” = -1 – √49/2.1
x” = -1 – 7/2
x” = -4