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What number would u add to complete the square ? x^2+22x=9

What number would u add to complete the square ? x^2+22x=9
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1 vote
What number would u add to complete the square ? x^2+22x=9

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User QuestionC
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1 Answer

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To complete the square, take half of the coefficient of x, 22, square it, then add it to both sides of the equation.


x^2 + 22x = 9

22 / 2 = 11

11^2 = 121


x^2 + 22x + 121 = 9 + 121

x^2 + 22x + 121 = 130

Then you can go from there.
answered
User Krish Allamraju
by
8.6k points
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