Answer:
= 3r²s²
Explanation:
(-1s²)(-3r²)
(-1)(-3) = +3 = 3
(s²)(r²) = s²r² = r²s²
Then:
(-1s²)(-3r²) = 3r²s²
multiple (-1s^2)(-3r^2) = 3 s^2 r^2
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