omarspongebob55 omarspongebob55

13-02-2020
Mathematics

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slove by completing the square x^2+4x-5=0

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Respuesta :

amna04352 amna04352

18-02-2020

Answer:

-5 & 1

Step-by-step explanation:

[x² + 2(x)(2) + 2²] - 2² - 5 = 0

(x+2)² - 4 - 5 = 0

(x+2)² = 9

x+2 = +/- 3

x+2 = 3 x = 1

x+2 = -3 x = -5

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