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Earn +20 ptsQ: What number must you add to complete the square x2 4x 7?
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What number must you add to complete the square x2 plus 2x 23?
You need to add -22.
What number do you add to complete the square x2 plus 10x?
25
What number would you add to the equation x plus 4x0 to complete the square?
You would add 4.
What number must you add to complete the square of x2 6x17?
To complete the square of x^2 + 6x + 17, you need to add (6/2)^2 = 9 to the expression. This is because half of the coefficient of x is 6/2 = 3, and squaring that gives you 9. So the completed square is x^2 + 6x + 9 + 17 = (x + 3)^2 + 17.
What number must you add to complete the square of x2 minus14 equals 7?
Since there are only terms in x2 and constants, but none in x, completing the square is not an option! x2 - 14 = 7 x2 = 21 and so x2 = sqrt(21)
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