Back to Rewrite expressions using structure — Problem 3 · Task Set 3

HSA.SSE.A.2 Tutor Intake — Rewriting Expressions Using Structure

This short check helps your tutor understand where to start. Answer each question on your own — no notes or calculator. If you're not sure, give your best try. The goal is to find what to work on together, not to grade you.

Grade 9·10 problems·~15 min·Common Core Math - HS Algebra·standard·hsa-sse-a-2

Work through problems with immediate feedback

Concepts

A student claims: " $x^2 + y^2$ can be factored as $(x + y)(x - y)$ ."

Which statement BEST explains why this is incorrect?

$(x+y)(x-y) = x^2 - y^2$ , which has a minus sign — not the same as $x^2 + y^2$

The student should have written $(x+y)^2$ instead

Only expressions with three terms can be factored

The formula only works when $x = y$