Answer
$25r^{2}$ - 30rt + 9$t^{4}$
Work Step by Step
1. Square of a binomial $(5r - 3t^{2})^{2}$ = $(5r)^{2}$ + 2(5r)(-3t) + $(-3t^{2})^{2}$
2. Solve exponents and multiply $25r^{2}$ - 30rt + 9$t^{4}$
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