Problem 159 of 7
Correct the complex quadratic solution error in 2x^2+18=0 gives x=3.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
catch discriminant, square-root, sign, and standard-form mistakes.
Hidden until you reveal it.
Worked example must contain square-root, discriminant, division, or classification error.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Identify the step involving discriminant or square root.
2. Apply sqrt(-a)=i sqrt(a) and divide all terms correctly.
3. State the corrected solution classification or roots.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Merely saying the solution is wrong.