Question

2x+4*2-x)-7=5x-(3-2x)

Answer 1

Resposta:

X' = -4

X'' = 1/2

Explicação passo-a-passo:

(2X + 4) * (2 - X) - 7 = 5X - (3 - 2X)

4X - 2X^2 + 8 - 4X - 7 = 5X - 3 + 2X

-2X^2 - 7X + 4 = 0

∆ = (-7)^2 - 4*-2*4

∆ = 49 + 32

∆ = 81

X = 7 +- ✓81/2*-2

X = (7+- 9)/-4

X' = -4

X'' = 1/2