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A trinomial is perfect square if it can be factored into the form
No.
It is a trinomial of the form x2 + 2xy + y2 where x and y are integers because:it is the square of (x + y) andit is a trinomial.And some clever person decided that it might make sense to use the phrase "perfect square tronimial" to describe something which is a perfect square and also a trinomial.
It can be factored as the SQUARE OF A BINOMIAL
A trinomial is perfect square if it can be factored into the form (a+b)2 So a2 +2ab+b2 would work.