5A 0708 Revision Test 2 Answers

一至四題之解答。

第五第六題之解答。

Review: Polynomials

1. Write down the sum of
a) (x - 3) and (3x + 2)

b) (4x² - 3x - 2) and (2x² +5x - 6)

2. Write down the difference when
a) (3x - 2) is subtracted by (2x - 5)

b) (2x - 7) is subtracted by (5x + 4)

c) (3x + 6) is subtracted by (2x - 5)

d) (4a - b) is subtracted by (2a + b)

e) (3a + 2b) is subtracted by (a - 4b)

3. Write down the product of
a) (x + 2) and (x + 3)

b) (x + 5) and (x + 1)

c) (x - 2) and (x - 1)

d) (x + 4) and (x - 3)

e) (x - 5) and (x + 2)

f) (2x - 1) and (x - 2)

g) (2x + 3) and (x - 1)

h) (3x - 2) and (2x - 3)

4. Expand
a) (x - 3)²

b) (x + 4)²

c) (2x - 3)²

d) (3x - 1)²

e) (4a - 5)(a + 2)

f) (3a - b)(2a + b)

g) (5a - 2b)(a + b)

5A 0708 Revision Test 1 Answers

第一至四題之解答。
第五、六題之解答。
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