Question

Expand (5 - y)^3

Answer 1

\[125-75 y+15 y^2-y^3 \]

Answer 2

thank you :)
im really stuck on this only:
expand (sqrt c -1)^6

Answer 3

(√c -1)^6

Answer 4

\[\left(\sqrt{c-1}\right){}^{\wedge}6=c^3-3 c^2+3 c-1 \]\[\left( \sqrt{c}-1\right)^6=-6 c^{5/2}-20 c^{3/2}+c^3+15 c^2+15 c-6 \sqrt{c}+1\]

Answer 5

these are my choices:
c^3 + 6c^2 √c - 15c^2 + 20c √ - 15c + 6 √c -1
c^3 + 6c^2 √c + 15c^2 + 20c √ - 15c + 6 √c + 1
c^3 - 6c^2 + 15c^2 - 20c + 15c - 6 √c + 1

Answer 6

c^3 + 6c^2 - 15c^2 + 20c - 15c + 6 √c - 1

Answer 7

Those are the 4 choices.

Answer 8

Refer to the attachment. Your 3rd answer choice is the closest to WolframAlpha's answer. Your choice 1, 2 and 4 each have a -15c term.