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Q: Is X squared plus 6X plus 9 a perfect square trinomial?

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Yes because its discriminant is equal to zero

No.

Yes; the factored form would be (9c+4)(9c+4) or just (9c+4)2 Since the two factors are the same, the beginning trinomial 81c2+72c+16 is a perfect square trinomial

The given quadratic expression can not be factored as a perfect square.

false!

It's a second degree trinomial expression in x. It's a perfect square, being the square of (x-2).

Yes.

True

Factors are (7y - 3)(7y - 2) so it's not a perfect square.

64

Yes because if x2-14x+49 then it is (x-7)(x-7) when factored

Yes. (Y+5)2

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