# Chapter 4 - Polynomials - Review Exercises: Chapter 4: 3

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#### Work Step by Step

RECALL: $(a+b)^2=a^2+2ab+b^2$ $(a-b)^2=a^2-2ab+b^2$ The trinomials on the right side of the two formulas above are called perfect square trinomials. Thus, the square of a binomial is a perfect square trinomial.

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