Question

3x-7+2 vezes (x+1)=2x -3

Answer 1

(3x - 7 + 2) ( x + 1) = 2x - 3
(3x - 5) (x + 1) = 2x - 3
3x² + 3x - 5x - 5 = 2x - 3
3x² - 2x - 5 = 2x - 3
3x² - 2x - 2x = 5 - 3
3x² - 4x - 2 = 0

Δ = 16 - 4.3.(-2)
Δ = 16 + 24
Δ = 40

x' = -(-4) + 6,32
            6

x' = 10,32
        6

x' = 1,72

x" = -(-4) - 6,32
            6

x" = 4 - 6,32
          6
x" = - 0,386