## Calculus with Applications (10th Edition)

$(9k+q)(2k-q)=18k^{2}-7kq-q^{2}$
$(9k+q)(2k-q)$ Evaluate the binomial product using the FOIL (First, Outer, Inner, Last) method and simplify by combining like terms: $(9k+q)(2k-q)=18k^{2}-9kq+2kq-q^{2}=...$ $...=18k^{2}-7kq-q^{2}$