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Earn +20 ptsQ: X2 plus 14x equals -7 what number is added to complete the square?
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Continue Learning about Math & Arithmetic
Find a positive number that equals 12 when added to its square?
3
What number must be added to complete the square of x SQUARED plus 12x equals -3?
9
Find a positive number that equals to 72 when added to its square?
82+8 = 72
What number can be added to complete the square x2 plus 10x equals 14?
9 needs to be added to complete the square. When squaring (x + n), the result is x2 + 2nx + n2. We have +10x, so n must be 10/2 = 5. Thus: (x + 5)2 = x2 +10x + 25 = x2 +10x + 14 + 9 So 9 needs to be added to complete the square, giving: x2 +10x + 14 = (x + 5)2 - 9
What number must be added to the polynomial to complete the square x2-9x?
-7
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