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a fost răspuns

Dezvolati folosind formula: (a+b)²=a²+2ab+b²
1) (x+3y)²
2) (xy+2)²
3) (a+2xy)²
4) (4a+3y)²
5) (12a+4b)²

Răspuns :

Cataclyzmic
1) x²+6xy+9y²
2) x²y²+4xy+4
3) a²+4xya+4x²y²
4) 16a²+24ay+9y²
5) 144a²+96ab+16b²

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