Answer:
(2r + 3)(s - 2t)
Explanation:
2rs - 4rt - 6t + 3s ← rearrange terms
= 2rs + 3s - 4rt - 6t ( factor first/second and third/fourth terms )
= s(2r + 3) - 2t(2r + 3) ← factor out (2r + 3) from each term
= (2r + 3)(s - 2t)
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