Answer
$81k^{2}+36kq+4q^{2}$
Work Step by Step
$(9k+2q)^{2}=$
...square the binomial.
$=(9k)^{2}+2(9k)(2q)+(2q)^{2}$
...simplify.
=$81k^{2}+36kq+4q^{2}$
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