Question

СРОЧНО ДАЮ 40 БАЛЛОВ!

Answer 1

Ответ:

$2.(5m - 2n)(5m + 2n) \\ 25 {m}^{2} - 4 {n}^{2} \\ 3.( \frac{1}{2}x - 3y)( \frac{1}{2}x + 3y) \\ \frac{1}{4} {x}^{2} - 9 {y}^{2} \\ 4.(0.1p - 0.7q)(0.1p + 0.7q) \\ 0.01 {p}^{2} - 0.49 {q}^{2} \\ 5.( \frac{1}{7}c - \frac{1}{3} d)( \frac{1}{7}c + \frac{1}{3} d) \\ \frac{1}{49} {c}^{2} - \frac{1}{9} {d}^{2}$