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Verified answer
= 2x^5 + 10x^4 - 2x^3 + 2x^2 - 3x^4 - 15x^3 + 3x^2 - 3x= 2x^5 + 7x^4 -17x^3 + 5x^2 - 3x
Koefisien x^4 = 7
=2x^5+10x^4-2x^3+2x^2-3x^4-15x^3+3x^2-3x
=2x^5+7x^4-17x^3+5x^2-3x
jadi koef dari x^4 adalah 7