victoria166 victoria166

18-05-2017
Mathematics

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what number must you add to complete the square x^2+2x=18

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bd3331401 bd3331401

18-05-2017

Add 1 to both sides
x^2 + 2x + 1 = 18 + 1
left side is the square of the sum
(x + 1)^2 = 19

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