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To solve the equation x^2 - 8x = 12 by completing the square, what number must be added to both sides of the equation?

User Joe DF
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1 Answer

3 votes

Answer:

x² - 8x = 12

x² - 8x + ((1/2)(8))² = 12 + 16

x² - 8x + 16 = 28

16 must be added to both sides of this equation.

User Sbohlen
by
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