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For what real values of $a$ is $x^2 + ax + 25$ the square of a binomial? If you find more than one, then list the values separated by commas.

 Jan 11, 2021
 #1
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x^2  +  ax  +  25

 

Reverse the steps  in completing the square

 

Take the  square root of 25  = 5,  -5

 

Double these   = 10 ,  -10   =     a

 

 

cool cool cool

 Jan 12, 2021

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