Respuesta :

Answer:

    (x - 2) (x + 5) = 18

⇔5x + x² - 2x - 10 = 18

⇔x² + 3x               = 18 + 10

⇔x² + 3x               = 28

⇔x² + 3x - 28       = 0

⇔x² + 4x - 7x - 28= 0

⇔x(x +4) - 7(x + 4)= 0

⇔(x - 7) (x + 4)      = 0

⇔x - 7 = 0 or x + 4 = 0

⇔x      = 7 or x        = -4

GreatNikolaTesla

Answer:

x=4

Explanation:

(4-2)(4+5)=18

2*9=18

I hope it helped you