Back to Rewrite expressions using structure — Problem 1 · 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

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Procedures

Which of the following expressions correctly identifies the
"parts" $a$ and $b$ for factoring $4x^2 - 9$ as a difference
of squares?

$a = 4x$ and $b = 3$ , giving $(4x + 3)(4x - 3)$

$a = 2x$ and $b = 3$ , giving $(2x + 3)(2x - 3)$

$a = 2x$ and $b = 9$ , giving $(2x + 9)(2x - 9)$

$a = 4x^2$ and $b = 9$ , giving $(4x^2 + 9)(4x^2 - 9)$