225k views
5 votes
100 Points!!! Determine if the equation (2x²+y²)²=(2x²-y²)²+(2xy√2)² is a polynomial identity. Photo attached. Please show as much work as possible. Thank you!

100 Points!!! Determine if the equation (2x²+y²)²=(2x²-y²)²+(2xy√2)² is a polynomial-example-1

1 Answer

4 votes

Answer:

Yes, it is a polynomial identity (work below).

Explanation:

Let's start by expanding the left side of the equation.


(2x^2+y^2)^2=\\4x^4+y^4+4x^2y^2

Now, let's expand the second side.


(2x^2-y^2)^2+(2xy√(2) )^2=\\4x^4+y^4-4x^2y^2+4x^2y^2(2)=\\4x^4+y^4-4x^2y^2+8x^2y^2

There are no like terms on the left side, so let's combine the like terms on the right side.


4x^4+y^4-4x^2y^2+8x^2y^2=\\4x^4+y^4+4x^2y^2

Now, let's check if the left and right sides are equal:


4x^4+y^4+4x^2y^2= 4x^2+y^4+4x^2y^2

Both sides are the same. Thus, the equation is a polynomial identity.

User Morten Olsen
by
7.9k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories