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Use the polynomial identities to expand the square of a binomial.
x^2+6x+9
We can find the product of this expression using polynomial identities. Let's start by rewriting the expression as a square of a binomial. (x+3)(x+3)=(x+3)^2 Now, we have the square of a binomial. Let's expand it!
(a+b)^2=a^2+2ab+b^2
Calculate power
Multiply