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What number goes in the box so that \[x^2 + 18x + \boxed{\phantom{00}}\]is the square of a binomial? If you find more than one, give your answer as a list.

What number goes in the box so that \[x^2 + 18x + \boxed{\phantom{00}}\]is the square of a binomial? If you find more than one, give your answer as a list.
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What number goes in the box so that \[x^2 + 18x + \boxed{\phantom{00}}\]is the square of a binomial? If you find more than one, give your answer as a list.

asked
User Gkeenley
by
8.4k points

1 Answer

4 votes

Answer:

81

Explanation:

x² + 18x

x² + 2(x)(9) + 9²

x² + 2(x)(9) + 81

(x + 9)²

answered
User Frnt
by
8.7k points
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