Question

preciso de ajuda com a resolucao tambem !

Answer 1

a) (3a+b)²= (3a+b). (3a+b)= 9a²+6ab+b²

b) (2x+3y)² = (2x+3y). (2x+3y)= 4x²+12xy+9y²

c) (m/3+n)² = (m/3+n).(m/3+n)= m²/9+mn/6+n²