Question

Please answer the attached question by selecting of the the given answers.

Answer 1

C

Explanation:

Factor, where possible the expressions on the numerators/ denominators

3x - 21 = 3(x - 7) ← common factor of 3

x² + 3x = x(x + 3) ← common factor of x

7x - 49 = 7(x - 7) ← common factor of 7

The rational expression can now be written as

`(3(x-7))/(x)` ×
`(x(x+3))/(7(x-7))`

Cancelling the factors x, x - 7 on the numerator/denominator leaves

`(3(x+3))/(7)` → C

Answer 2

The answer is C.3(x+3)/7

Explanation: