<PRE><B>Question 74577</B>
Determine whether each of the following is a trinomial square.
Conditions: 1st and 3rd terms are perfect squares
2nd term is + or - twice the product of the square roots of 1st and 3rd
1. x^2-14x + 49   -------yes 
2. x^2-10x - 25   -------yes
3. 36x^2-24x+16   -------no; middle term is not 2(6x)(4)=48x
4. 16x^2-40xy+25y^2 -----yes
5. 9x^2 - 36x + 24 ------no; 24 is not a perfect square
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Cheers,
Stan H.

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