Back to Solve quadratic equations — Problem 1 · 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 solves $(x - 3)^2 = 25$ and writes only $x = 8$ .

What error did the student make?

The student should have subtracted 25 from both sides first.

The student forgot to include the negative root; the solutions are $x = 8$ and $x = -2$ .

The student should have expanded $(x-3)^2$ before solving.

The student's answer is correct — there is only one solution.