Back to Solve quadratic equations — Problem 2 · Task Set 37

HSA.REI.B.4 Tutor Intake — Solving Quadratic Equations

This short check helps your tutor understand where to start. Answer each question without help. If you are not sure, give your best try — the goal is to find what to work on together, not to grade you.

Grade 9·9 problems·~14 min·Common Core Math - HS Algebra·standard·hsa-rei-b-4

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Concepts

A student is completing the square on $x^2 + 10x - 3 = 0$ .
They write: $x^2 + 10x = 3$ , then add $25$ to the left side to get
$x^2 + 10x + 25 = 3$ .

What error did the student make?

The student should have added $5$ , not $25$ .

The student added $25$ to only the left side; they must also add $25$ to the right side.

The student should have moved the constant to the left side, not the right.

The student's work is correct so far.