Question

Which of the following is the LCM of the polynomials: (x^2+10x+9) and (x^2-1)
A. (x+1)
B. (x+1) (x+9)
C. (x+1)(x-1)
D. (x+1) (x-1) (x+9)

Answer 1

last one

Answer 2

uhh, i don't think so..

Answer 3

how is (x+1)(x-1)(x+9) a multiple of (x^2 - 1) ?

Answer 4

the answer is A, x+1

Answer 5

because the first polynomial can be factored into (x+1)(x+9) and the second one can be factored into (x+1)(x-1)....so the least common multiple is (x+1)