SOLUTION: Identify the number that needs tobe added to both sides of the equation x^2

SOLUTION: Identify the number that needs tobe added to both sides of the equation x^2 - 4x = 21 to complete the square.

Question 321797: Identify the number that needs tobe added to both sides of the equation x^2 - 4x = 21 to complete the square.

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Identify the number that needs tobe added to both sides of the equation x^2 - 4x = 21 to complete the square.
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Add 4.

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