# Polynomials and Rational Expressions Question

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## Grade 12 Polynomials and Rational Expressions CCSS: HSA-APR.C.4

[math]"Prove: " \ (x^2 + y^2)^2 = (x^2 - y^2)^2 + (2xy)^2[/math]

Left Side: [math](x^2 + y^2)^2[/math]

Step 1: [math](x^4+y^4)[/math]

Step 2: [math]x^2+2x^2y^2+y^2[/math]

Step 3: [math](x^2-y^2)^2+(2xy)^2[/math]

- The proof is correct.
- Step 1 has an error.
- Step 2 has an error.
- Step 3 has an error.