Question

Y^3-27=9y^2-27y how to factor

Answer 1

Hello! And thank you for your question!

First we are going to redo the equation:

y​^3​​−3y^​2​​(3)+3(y)×3​^2​​−3​^3​​=0

Then we are going to use Cube of Difference:

0 = (y - 3)^3

That take cube root of both sides:

0 = y - 3

Finally add 3 to both sides:

3 = y

Final Answer:

y = 3