sonic301267 sonic301267

25-03-2020
Mathematics

contestada

Solve the quadratic equation by completing the square.

x2 - 10x + 18 = 0

A) x = 5 ±
7
B) x = -5 ±
7
C) x = 5 ±
43
D) x = -5 ±
43

Respuesta :

amna04352 amna04352

26-03-2020

Answer:

A

Step-by-step explanation:

x² - 10x + 18 = 0

x² - 2(x)(5) + 5² - 5² + 18 = 0

(x - 5)² = 7

x = 5 + sqrt(7), 5 - sqrt(7)

sqrt: square root

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