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Add and subtract $\displaystyle\left(\frac{b}{2a}\right)^2$
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$z^2-16z+36+64-64$
Learn how to solve polynomial factorization problems step by step online. Factor the expression z^2-16z+36. Add and subtract \displaystyle\left(\frac{b}{2a}\right)^2. Factor the perfect square trinomial z^2+-16z+64. Subtract the values 36 and -64.