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6 December, 16:57

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

+1
Answers (1)
  1. 6 December, 17:23
    0
    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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