## Wednesday, January 19, 2011

### Factors (lesson 1)

Watch the following videos and complete the task that follows.

Video 1 Prime Factorisation

Video 2: Index Notation

Find the prime factors of the following, where possible express your answers in index notation
(a) 1432
(b) 131
(c) 11760
(d) -48

1. (a)[2^4 X 179]
(b)131 cannot be factorize as it is a prime number.
(c)[2^5 X 3 X 5 x 7]
(d) negative numbers are not prime factors

2. 2^2 x 179
131
2^ x 3 x 5 x 7^2
-48 is not a positive number, hence, cannot be primed factorised

3. (a) 2^3 * 179
(b)131 canot be factorized because it is a prime number.
(c)2^4 * 5 * 7^2
(d)-48 is negative and negative numbers cannot be prime factorized as they are not prime.

4. a) 2^3 * 179
b) 131 * 1
c) 2^4 * 5 * 7^2
d) -48 is negative and cannot be prime factorised

5. a) 2^3 x 179
b)131 is a prime number itself so it cannot be factorized
c) 2^8 x 5 x 3
d) 2^4 x 3 x 5 x 7^2

6. a) 2^3 x 179
b) 131 is a prime number thus it cannot be factorize.
c) 2^4 x 3 x 5 x 7^2
d) -48 is a negative integer thus is cannot be factorize.

7. a) 2^3 × 179
b) 131 is a prime number itself
c) 2^4 × 5 × 3 × 7^2
d) -48 is a negetive number, and only posived numbers can be prime factorised

8. a)2^3x179
b)131 can only be divided by itself and 1
c)2^4x5x7^2x3
d)-48 is a negative number.it cannot be factorised

9. a)2^3x179
b)131 is a prime number
c)2^4x5x3x7^2
d)-48 is a negative number so it can't be factorised.

10. a)2^3x179
b)131 is already a prime number
c)2^4x7^2x5x3
d)-48 is a negative number and is impossible to factorise

11. This comment has been removed by the author.

12. a) 2^3 x 179
b)131 is a prime number
c)2^4 × 3 × 5 × 7^2
d) negative numbers cannot be factorized.

13. a) 2^4 X 179
b) 131 cannot be factorize as it is a prime number.
c) 2^5 X 3 X 5 X 7
d) negative numbers are not prime factors

14. Charles O&#39;Rourke1/23/2011 05:06:00 PM

2^3 x 179
131 is a prime number and can't be fatorized
2^4x7^2x5x3
-48 is negative and only positive numbers cannot be factorized