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The square of 9 less than a number is 3 less than the number. What is the number?

November 21, 2022 0

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Hi,

(x – 9)² = x – 3

x² – 18x + 81 = x – 3

x² – 19x + 84 = 0

(x – 12)(x – 7) = 0

x = 12 or x = 7 <==ANSWER

I hope that helps!! 🙂
The number is 12. The square of 9 less than 12 is the square of 3, which is 9. 3 less than 12 is 9. There you go.

Source(s): Gifted Student
x – 9² = x – 3

x – 81 = x – 3

The statement is false.

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Source(s): 3/28/13
9^2x=-3x