Answer
7$r^{3}$s(4rs + 1 - 5r$s^{2}$)
Work Step by Step
1. The GCF of 28$r^{4}s^{2}$, 7$r^{3}$s, and -35$r^{4}s^{3}$ is 7$r^{3}$s.
2. Factor out the GCF.
7$r^{3}$s(4rs + 1 - 5r$s^{2}$)
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