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= 5y.5y + 5y.3+ 3.5y + 3.3
=25y² +15y+15y+9
=25y² +30y+9
= 25y²+30y+9
caranya, pertama 5y dikuadratkan , trus kalikan 5y dikali 3 dikali dengat pangkat juga yaitu 2, lalu terakhir kuadratkan nilai 3 . . . :)