SOLUTION: Identify the numbers that needs to be added to both sides of the equation x^2 - 4x +21 to complete the square. a. 6 b. 3 c. 4 d. 21

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Question 321782: Identify the numbers that needs to be added to both sides of the equation x^2 - 4x +21 to complete the square.
a. 6
b. 3
c. 4
d. 21
Found 2 solutions by solver91311, Alan3354:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Divide the coefficient on the first degree term by 2 and then square the result.


John

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Identify the numbers that needs to be added to both sides of the equation x^2 - 4x +21 to complete the square.
a. 6
b. 3
c. 4
d. 21
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1st, it's not an equation, there's no equal sign.
If you make it = 0, then
x^2 - 4x +21 = 0
You have to add -17 to both sides.