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The trinomial $x^2-24x+144$ is a perfect square trinomial, because it's discriminant is equal to zero
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$\Delta=b^2-4ac=-24^2-4\left(1\right)\left(144\right) = 0$
Learn how to solve simplification of algebraic expressions problems step by step online. Simplify the expression x^2-24x+144. The trinomial x^2-24x+144 is a perfect square trinomial, because it's discriminant is equal to zero. Using the perfect square trinomial formula. Factoring the perfect square trinomial.