Question

The expression x^4-9

a. (x^2-3) (x^2-3)

b. (x^+3) (x^+3)

c. (x^2+3) (x^2-3)

d. (x^+1) (x^2-9)

Answer 1

Answer: C

Explanation:

By the difference of squares,
`x^(4)-9=(x^(2)+3)(x^(2)-3)`