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Type: Multiple-Choice
Category: Polynomials and Rational Expressions
Level: Grade 12
Standards: HSA-APR.C.4
Author: jjstanley
Last Modified: 6 years ago

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Polynomials and Rational Expressions Question

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

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

$"Prove: " \ (a+b)^2 = a^2 + 2ab + b^2$

Left Side:

$(a+b)^2$
Step 1:

$(a+b)(a+b)$
Step 2:

$a^2+ab+ab+b^2$
Step 3:

$a^2+2ab+b^2$

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