Sixxis4life Sixxis4life

16-03-2018
Mathematics

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What number must be added to both sides of the equation to complete the square? x^2-14x=7

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WhyDoDis WhyDoDis

16-03-2018

x^2 - 14x - 7 = 0
x^2 - 14x + 49 - 49 -7= 0
(x^2 - 14x + 49) - 49 - 7= 0
(x - 7)^2 - 56 = 0
i achieved 49 by:
first divide the 14 by 2 and then square it.
14/2= 7
7^2 = 49

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