Question

(2x-1) 2 =????????????

Answer 1

Oie, Td Bom?!

$= (2x - 1) {}^{2}$

$= (2x) {}^{2} - 2 \: . \: 2x \: . \: 1 + 1 {}^{2}$

$= 4x {}^{2} - 4x + 1$

Att. Makaveli1996