Asked by Eleanor
For what real values of 2x^2+ax+25 the square of a binomial? If you find more than one, then list the values separated by commas.
Answers
                    Answered by
            Steve
            
    ((√2 x) + k)^2 = 2x^2 + 2√2 kx + k^2
So, we need k=±5
That means a = ±10√2
    
So, we need k=±5
That means a = ±10√2
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