A trinomial can be a perfect square if it satisfies the following:

The first term is a perfect square.

The third term is a perfect square.

The middle term is either or times the product of the square root of the first term and the square root of the third term.

Rewrite as .

Pull terms out from under the radical, assuming positive real numbers.

Rewrite as .

Pull terms out from under the radical, assuming positive real numbers.

The first term is a perfect square. The third term is a perfect square. The middle term is times the product of the square root of the first term and the square root of the third term .

The polynomial is a perfect square.

Determine if the Expression is a Perfect Square 4x^2-12x+9