Question

Выполните действия: (2 + т)2 (2 - т)2=?

Answer 1

(2+т)2(2-т)2=?
2+т*4-2т*2=?
2+4т-2т*2=?
4т-2т=2+2
2т=4
т=2

Answer 2

Может так:
(2+t)² (2-t)² = (4+4t +t²)(4-4t+t²) =
=16-16t+4t²+16t-16t²+4t³ +4t²-4t³+t⁴=
= 16+ (-16t+16t) +(4t²-16t²+4t²) +(4t³-4t³) +t⁴=
=16-8t² +t⁴= (t²)² -2*4*t²+4²= (t²-4)²