Question

Factorise the following expressions :
2. 25 - x^2
3. 9b^2 – 16
1. a^2-4
7. 49c^2 – 25d^2
8. 100 - r^2
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Answer 1

2. (5 + x)(5 - x)

3. (3b - 4)(3b + 4)

1. (a + 2)(a - 2)

7. (7c - 5d)(7c + 5d)

8. (10 - r)(10 + r)

Hope it helps