Find the product (3x – 7)(3x + 7) using a suitable identity.

9

Find remainder when f(x) = x³ + 4x² – 9x + 10 is divided by (x – 2).

10

If x = –1/2 is a zero of the polynomial p (x) = 8x³ – ax² – x + 2, find the value of a.

12

Factorize: 64a³ – 27b³ – 144a²b + 108ab².

13

Evaluate 106 × 94.