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Yanka [14]
4 years ago
9

What number must you add to complete the square? x^2+14x=-7

Mathematics
2 answers:
viktelen [127]4 years ago
6 0
To complete the square of a polynomial, use the term "(b / 2) ^ 2".

In this polynomial, the "b" term is 14.
Plug that in.

(14 / 2) ^ 2
7 ^ 2

49.

The answer is C.
adoni [48]4 years ago
3 0
First you need to divide b by 2a.
14/2(1)
14/2 = 7

Then square that number you got.

7^2 = 49

The answer is C. 49.
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