Question

Expand (5 - y)3

Answer 1

you would multiply everything inside the parenthesis by three. Then what would you get?

Answer 2

I'm pretty sure they meant \((5 - y)^3\)

Answer 3

The first step to expand \((5 - y)^3\) is to re-write in this manner:

\((5 - y)^3 = (5 - y)(5 - y)(5 - y)\)

Answer 4

Oh then don't listen to me lol

Answer 5

Next multiply \((5 - y)(5 - y)\). Expand that product, then take the result from that and multiply it by \((5 - y)\) once more.

Answer 6

\((5 - y)(5 - y) = 5(5 - y) - y(5 - y)\)
\( = 25 - 5y - 5y + y^2\)
\(= 25 - 10y + y^2\)

Now multiply that result by \((5 - y)\) as follows:

\((25 - 10y + y^2)(5 - y) = 25(5 - y) - 10y(5 - y) + y^2(5 - y)\)
\(= 125 - 25y - 50y + y^2 + 5y^2 - y^3\)
\(=125 - 75y + 6y^2 - y^3\)

Answer 7

Do you have any questions about this process @ashlynnwilson8 ?

Answer 8

no i got it thank you