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Find all possible values for the missing number (__) that make this expression the square of a binomial.
x^2+18x+__
If you find more than one, then list the values separated by commas.

 Apr 30, 2022
 #1
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Let the missing number be k^2

then 18x = 2xk

and so k = 9

 

this makes the missing number be 9^2 = 81

 Apr 30, 2022

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