Answer
225
Work Step by Step
$(pq)^2\longrightarrow$ substitute the given values for p and q
=$(5\times-3)^2\longrightarrow$ multiply in parentheses
=$(-15)^2\longrightarrow$ simplify the exponent
=$-15\times-15\longrightarrow$ multiply
=$225\longrightarrow$ since there are an even number of negative factors, the product is positive.
