I need help factoring this problem?

Question

9x^4 - 9

is it prime or can you factor it?

i need help ive been working on this all day?

i need an answer

Answer 1

any time you have  perfect squares and a minus sign the figure will factor the a squared minus factor will factor again

this is an a squared minus b squared question

divide by 2, then you have an a squared plus b squared

last can be done the same as the first with 16 and 25 being perfect squares