Find the product using suitable identities:

(i) (3a + 4b)(9a² - 12ab + 16b²)

(ii) $\Big(y - \dfrac{6}{y}\Big)\Big(y^2 + 6 + \dfrac{36}{y^2}\Big)$

Simplify using suitable identity:

(3x - 5y - 4)(9x² + 25y² + 16 + 15xy - 20y + 12x)

Write down the following products:

(x + 8)(x - 3)

Write down the following products:

(x - 5)(x - 7)