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1. Difficulty : Level 3

Factorize x² – 16.

2. Difficulty : Level 3Simplify (7 – 6x)( –5x + 2) – (4x – 1)(2x – 3) and express the answer in descending powers of x.

(7 – 6x)( –5x + 2) – (4x – 1)(2x – 3) = 22x2 – 33x + 11

(7 – 6x)( –5x + 2) – (4x – 1)(2x – 3) = 22x2

(4x – 1)(2x – 3) = 22x2 – 33x + 11

3. Difficulty : Level 3

Simplify (8 – 3x)(5x + 7) + (3x + 1)(2x + 3) and express the answer in descending powers of x.

(8 – 3x)(5x + 7)= –9x2 + 30x + 59

(8 – 3x)(5x + 7) + (3x + 1)(2x + 3) = –9x2 + 30x + 59

(8 – 3x)(5x + 7) + (3x + 1)(2x + 3) = 59

4. Difficulty : Level 5*

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