Hi my name is Julio. Level: Secondary Who is asking the question: Student How can I factor the following?: 3x^{4} - 81 Thanks for your response.

Julio,

First take out the common factor of 3.

3x^{4} - 81 = 3(x^{3} - 27)

Can you see what to do now? A clue is that 27 = 3^{3}.

Penny