Q: What number must you add to complete the square x2 plus 2x 23?

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9

25

324

49-apex

You would add 4.

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You must add 1

it is 121

You must add (17n + 144).

You must add 36 to complete the square on the left hand side.You must add 36 to complete the square on the left hand side.You must add 36 to complete the square on the left hand side.You must add 36 to complete the square on the left hand side.

You need to add -6

square root -5 minus 14 or - square root -5 minus 14

The constant term - the part without a variable - must be equal to the square of one half the linear term - the number in front of the "x". That is, it must be (12/2)2 = 36.

9

25

That would depend on the plus or minus and equality signs of which none have been given.

324

144