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Math · Module 112:34

Question 7 of 22

Which expression is equivalent to 3x² + 6x + 3?

3(x + 1)²
B(3x + 1)²
C3x(x + 2)
D3(x² + 2x)
1

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Adaptive format mirrors the real Digital SAT — two modules per section, difficulty routing after Module 1.

Your answer

Choice B

Correct

Choice A

AI Explanation

Factor out 3 first: 3(x²+2x+1). Now x²+2x+1 is a perfect square — it equals (x+1)². Choice B expands to 9x²+6x+1, which is different.

2

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Every question gets a plain-English AI explanation so you learn the concept, not just the answer.

Skills to focus on

sample data
Inference52%
Geometry61%
Systems of Eq.68%
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3

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Skill-targeted drills and spaced-repetition flashcards keep you working on what matters most.

Why it works

Built for how you actually learn.

Most prep tools give you more practice. We give you the right practice — targeted, explained, and tracked against your specific gaps.

Real Digital SAT format

Full two-module adaptive structure per section — same difficulty routing as the actual test. Not simplified, not old-format.

Explanations that teach

Every wrong answer gets a breakdown of the reasoning — not just "the correct answer is C." You learn why C is wrong and why A is right.

Skill-level insight

Not "Math: 72%." You see Inference: 52%, Geometry: 61%, Systems of Equations: 68% — so you know exactly where points are going.

A plan that adjusts

Your weakest skills feed a daily study schedule automatically. No guessing what to practice next — just show up and work the plan.

Analytics

Know your weak spots before test day.

See your accuracy broken down by skill, the difficulty bands where you're losing the most points, and exactly how long you're spending on each question type — so you stop studying what you already know.

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Accuracy by Skill

sample data
Linear Equations
Math91%
Main Idea
R&W87%
Transitions
R&W82%
Data Analysis
Math74%
Inference
R&W68%
Systems of Equations
Math61%
Geometry
Math54%
Strong (≥80%)
Needs work
Weak spot

Avg. time per question

sample data
Linear Eq.
68s
Main Idea
82s
Data Anal.
91s
Inference
134s
Transitions
77s
Geometry
198s
Systems Eq.
156s

Dashed line = 1:50 pace target. Red bars are where time is being lost.

AI TutorActive
Reviewing: Q14 · Reading & Writing · Inference
Why isn't choice B correct here? The passage does mention tone.
Good catch — it does mention tone. But B says "dismissive," and that's the problem. Look at lines 12–14: the author acknowledges the opposing view before responding to it. That's cautious, not dismissive. Cautious = hedging. Dismissive = refusing to engage. Does that distinction land?

AI Tutor

Ask why, not just what.

After any question you missed, open the built-in tutor and ask anything — why your answer was wrong, how to spot the pattern next time, or what concept you're missing. It knows the exact question and your reasoning.

  • Explains the reasoning, not just the answer key
  • Remembers your specific wrong choice and why it looked right
  • Breaks down the underlying concept so it sticks

From students

I'd been grinding vocab flashcards for months thinking that was my weakness. The analytics showed my inference accuracy was at 52% — that was the actual problem. I wouldn't have found that on my own.

Priya R.

Junior, retaking in spring

The explanations don't just say 'because the passage says X.' They walk through the actual reasoning. That's the difference between knowing an answer and understanding why, and it's the thing that finally made concepts stick.

Marcus T.

First-generation college applicant

I kept running out of time on Math Module 2. Turns out I was averaging four minutes on geometry questions and ninety seconds on everything else. Once I saw the breakdown, I knew exactly where to focus.

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Senior, applying early decision

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