Question

Solve the equation (x+1)(x+2)(x+3)(x+4)=1:

Answer 1

x = 0
x = -1
x = -2
x = -3

you know how that was got?

Answer 2

it's = 1 not 0 though

Answer 3

i don't

Answer 4

you are not going to solve this by hand
http://www.wolframalpha.com/input/?i=%28x%2B1%29%28x%2B2%29%28x%2B3%29%28x%2B4%29%3D1

Answer 5

But can you solve it by hand? Is it possible?

Answer 6

you have a fourth degree polynomial, so no.
i mean there is a formula, but it takes a page or more to show. no, there is no reasonable way to do it. look at the solution and you will see

Answer 7

ok thx