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What number goes in the question mark so that the quadratic is the square of a binomial? 9x^2 +6x+ x^2 + 4x + ?

 Sep 6, 2021
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9x^2 +6x+ x^2 + 4x + ?

10x^2 +10x +?

 

10 *(x^2 +x)

10 (x+1/2)^2

 

10 ( x^2 + x + 1/4 )

10x^2 + 10x + 2.5          =   ( sqrt 10 x   + 1/2 sqrt(10) )^2 

 Sep 6, 2021

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