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The trinomial $9z^2+30z+25$ is a perfect square trinomial, because it's discriminant is equal to zero
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$\Delta=b^2-4ac=30^2-4\left(9\right)\left(25\right) = 0$
Learn how to solve polynomial factorization problems step by step online. Factor the expression 9z^2+30z+25. The trinomial 9z^2+30z+25 is a perfect square trinomial, because it's discriminant is equal to zero. Using the perfect square trinomial formula. Factoring the perfect square trinomial.