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# Need help on 9th grade math!!?

Factor each polynomial, if possible. if the polynomial cant be factored put prime. ^ is symbol for squared. 10 points for ALL answers thanks (:

a^2 - 4

1 - 49c^2

36 - n^2

5c^2 - 4d^2

8n^2 - 72p^2

36n^2 - 25

t^2 - 64^2

25v^5x - 9v3x

75x^2 - 147y^2

### 3 Answers

- 8 years agoFavorite Answer
(a-2) (a+2)

(1-7c) (1+7c)

(6-n) (6+n)

prime

8(n-3) (n+3)

(6n-5)(6n+5)

(t-64) (t+64)

3x(5v^2-3)(5v^2+ 3)

3(5x-7y)(5x+7y)

- ?Lv 44 years ago
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- Anonymous8 years ago
sorry but this is your job. there are many more or less difficult methods

this was a big deal question before algebra was brought to Europe by the Arabs

in short it is a guessing game at first.

you know 2 * 3 = 6

but given 12 what numbers multiply together to give 12?

you know x * 2x = 2x^2

guess what (..) * (...) gives a^2 + b^2: be careful with negative multiplication

Source(s): start with the simplest and work to the hardest. NOT EVERY expression has a simple factor but all equations can be solved with "complex numbers" which include the square root of (-1), (if there is any such thing) (( there is, later in math))