Question

multiply: (x-1)(x+1)(x-3)(x+3)

Answer 1

\[(x ^{2}-1)(x ^{2}-9)\]

Answer 2

Hint: Difference of Square x Difference of squares

Answer 3

nitz, I thought you went to university

Answer 4

\[(a-b)(a+b)=a ^{2}-b ^{2}\]

Answer 5

@hero i was to go but my lecture got cancellled......so will go tomorrow at 9

Answer 6

im confused, what the final answer?

Answer 7

\[(x ^{4}-10x ^{2}+9)\]

Answer 8

Thank you!