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Type: Multiple-Choice
Category: Polynomials and Rational Expressions
Level: Grade 11
Standards: HSA-APR.C.4
Author: nsharp1
Last Modified: 21 days ago

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Polynomials and Rational Expressions Question

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Grade 11 Polynomials and Rational Expressions CCSS: HSA-APR.C.4

Is the following proof correct? If not, identify the first step that has an error.

[math]"Prove: " (n+2)^2 - n^2 = 4n+4 [/math]

[math]"Left Side: " (n+2)^2 - n^2 [/math]
[math]"Step 1 " ( \ (n+2) + n \ )( \ (n+2) - 1 \ ) [/math]
[math]"Step 2 " (2n+2) (2) [/math]
[math]"Step 3 " 4n+4 [/math]
  1. The proof is correct.
  2. Step 1 has an error.
  3. Step 2 has an error.
  4. Step 3 has an error.
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