Question 71616
Directions: determine whether each of the following trinomials is a perfect square. If it is, factor the trinomial. 
#48 
x^2-24x+48 
Not a perfect square because 48 is not a perfect square and the 
middle term is not twice the product of the square roots of the 1st and 3rd 
terms.
#54 
16x^2+40xy+25y^2
It is a perfect square:
(4x+5y)^2
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Cheers,
Stan H.