Question

sqrt!!!

Answer 1

\[\sqrt{n+5}=n-1\]

Answer 2

Start by squaring both sides, this eliminates the radical:
\[n+5 = n^2 -2n +1\] Subtract n and 5 from both sides:
\[n^2 -3n -4 = 0\] Now, try solving this by factoring or plugging in to the quadratic equation. Be sure to check them in the original.

Answer 3

wait what?

Answer 4

Where did I lose you?

Answer 5

the first part. im sorry I really don't understand these

Answer 6

Ok. We're going to square both sides. On the left side, we cancel out the square root. On the right side we have:
\[(n-1)^2 = (n-1)(n-1)= n^2 -n -n +1 = n^2 -2n +1\] using the FOIL method.

Answer 7

okay

Answer 8

can I just have the answer?
im sorry im really trying to get past this section