Question

( 3x + 2/3a)^2 resolvam pra mim?

Obs.:

2/3a = dois terços de a
^2 = elevado ao quadrado

Answer 1

$(3x+ \frac{2}{3a})^2=3x^2+2*3x* \frac{2}{3a}+ \frac{2^2}{3a^2}=9x^2+ \frac{4x}a}+ \frac{4}{9a^2}$