Question

2. (x – y )(x + y)

3. (c – d )(c + d )

4. ( e + f)(e – f )

5. (g + h)(g – h )

6. (k + m)(m – k)

7. (3a – 4в)(3a +4в)

8. (5x – 6)(6 + 5x)

9. (7y+8)(8 – 7y)

10. (9q- 10p)(9q +10p)

11. (12r +13s)(13s – 12r)
с объяснением

Answer 1

Ответ:

2.

$(x - y)(x + y) = x {}^{2} - y {}^{2}$

$(c - d)(c + d) = c {}^{2} - d {}^{2}$

$(e + f)(e - f) = e {}^{2} - f {}^{2}$

$(g + h)(g - h) = g {}^{2} - h {}^{2}$

$(k + m)(m - k) = m {}^{2} - k {}^{2}$

$(3a - 4b)(3a + 4b) = 9a {}^{2} - 16b {}^{2}$

$(5x - 6)(6 + 5x) = 25x {}^{2} - 36$

$(7y + 8)(8 - 7y) = 64 - 49y {}^{2}$

Вот так.