Question

EFECTUATI AJUTOR VA ROG
$( \frac{x}{3} ) +^{2} ( \frac{x}{3} -1) ^{2} +( \frac{x}{3} -2) ^{2} +( \frac{x}{3} -3) ^{2} +( \frac{x}{3} -4) ^{2}$

Answer 1

5x²/9+1+4+9+16-2x/3-4x/3-6x/3-8x/3=
5x²/9+30-20x/3=(5x²+270x-60)/9