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It's a binomial times a binomial, so you FOIL First multiply the First numbers 3z*z = 3z(^2) Then multiply Outers: 3z* -4 = -12z Nest, Inners: 9*z = 9z Finally, the Lasts: -4*9 = -36 Then, throw it all together in descending order, starting with the variable of highest degree to lowest: 3z^2 - 12z + 9z - 36 Last of all, simplify coefficients with like terms and you're good to go: 3z^2 - 3z - 36 Hope this helps!
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