When solving x^2 – 4x = –7 by completing the square what value is added to both sides of the equation?
A.) 8
B.) 4
C.) 2
D.) –2
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A.) 8
B.) 4
C.) 2
D.) –2
Will give best answer <333
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Verified answer
B) 4
So you get
x^2 - 4x + 4 = -7 + 4
(x-2)^2 = -3
This makes no sense because there is no need to add a constant before completing the square, you can complete the square straight away.