Question

Помогите!!! Алгебра!!!!!

Answer 1

$2x + 8x {}^{2} - 3 + 4x {}^{2}$

$2x + 12x {}^{2} - 3$

$12x {}^{2} + 2x - 3$

Answer 2

2х+8х*2-3+4х*2=12х*2-3

ответ 2.