Question

help! me ajudem por favor​

Answer 1

Resposta:

(3x+y)²= 9x² +6xy+ y²

(3a+2)²= 9a² +12a+4

(4a+y³)² = 16a² +8ay³+ y⁶

(3/4x+2/5y)²=

9/16x² +2(3/4)2/5)xy + 4/25 y²

9/16x²+12/20xy + 4/25y²