-3(4k²l + 3kl²) + 2(-9k²l - 4kl²)= -12k²l - 9kl² -18k²l - 8kl²= -12k²l - 18k²l - 9kl² - 8kl²= -30k²l - 17kl²= kl(-30k - 17l)
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-3(4k²l + 3kl²) + 2(-9k²l - 4kl²)
= -12k²l - 9kl² -18k²l - 8kl²
= -12k²l - 18k²l - 9kl² - 8kl²
= -30k²l - 17kl²
= kl(-30k - 17l)