Question

SCRIE NUMARUL 20 LA 2017 CA O SUMA DE DOUA PUTERI

Answer 1

$20^{2017}=20\cdot20^{2016}=(4+16)\cdot20^{(1008\cdot2)}=(2^2+4^2)\cdot\left(20^{1008}\right)^2=\\=\left(2\cdot20^{1008}\right)^2+\left(4\cdot20^{1008}\right)^2.$

Green eyes.

Answer 2

2la puterea a-2a + 4la puterea a-2a = 20