alexaarguello alexaarguello

22-04-2019
Mathematics

contestada

What is the solution to (x-2) (x+5)= 18

Respuesta :

JuliaN165 JuliaN165

22-04-2019

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

Answer Link

GreatNikolaTesla GreatNikolaTesla

22-04-2019

Answer:

x=4

Explanation:

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

2*9=18

I hope it helped you

Answer Link

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