So, my math homebook has the following exercise: 2n - 3b2n - 2(b2 - 25 - nb)
When I work out the problem, this is the answer I get: 2n - 3b2n - 1 - 42b2n - 1 (Which is equal to 2n - 3b2n - 1 - 16b2n - 1)
But, the solution key to my book shows that this is the answer:
2n - 3b2n - 1 - 4b2n - 1
So, did my answer book make a mistake, or am I the one doing so?
When I work out the problem, this is the answer I get: 2n - 3b2n - 1 - 42b2n - 1 (Which is equal to 2n - 3b2n - 1 - 16b2n - 1)
But, the solution key to my book shows that this is the answer:
2n - 3b2n - 1 - 4b2n - 1
So, did my answer book make a mistake, or am I the one doing so?