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2. 2a(3a-2b) = 6a^2-4ab
3. 3a^3(2a^2-4ax) = 6a^5-12a^4x
4. 5a^2(2a^2-2x) = 10a^4-10a^2x
5. 4a^2(3a^2-4ax) = 12a^4 -16a^3x
6. 3a^2b(2ab^2-3ab^3) = 6a^3b^3-9a^3b^4
7. 2a(3a-5b) = 6a^2-10ab
8. 7a(2a-b)+3a(5a-2b) = 14a^2-7ab+15a^2-6ab = 29a^2-13ab
9. 3a^2(2a^2-5ab)-2a^2(4a-b) = 6a^4-15a^3b-8a^3+2ab
^ -> pangkat
jadikan yg terbaik ya