Quick Fix Summary
TL;DR: In a WebAssign answer box, type sqrt( followed by the number or expression, then close the parenthesis. For example, type sqrt(16) to get √16. Use the calcPad toolbar for a visual interface, or type ^ for exponents and _ for subscripts.
What's Happening
Here's the thing: WebAssign needs specific text-based notation for math, which can be confusing if you're used to just writing symbols. The platform reads your typed characters to format things properly. For square roots, you can't just paste a radical symbol (√)—you've got to use the function-style syntax sqrt(). This system, which is still consistent as of 2026, works whether you're typing directly or using the calcPad tool palette.
Step-by-Step Solution
Follow these steps to enter a square root correctly in any WebAssign answer field.
- Click the answer box for the question. Doing this usually pops open the calcPad tool palette on the right or bottom.
- Type the square root syntax. Just go into the box and type sqrt(. For the square root of 25, you'd type: sqrt(25).
- Complete the expression and submit. After you've put the number or expression inside the parentheses, add the closing one. Your final input should look like sqrt(YourExpressionHere). Then, you can answer the rest of the question or just click "Submit".
- Alternative using calcPad (if available): If your question supports it, clicking the answer box opens calcPad. Click the √x (root) button on the palette. A dropdown appears; pick the first option for the standard square root. The syntax sqrt( ) gets inserted for you, and you can type your number between the parentheses.
If This Didn't Work
Honestly, if the sqrt() command isn't being accepted or you're dealing with something more complex, try these other approaches.
- Use Exponent Notation: Don't forget that a square root is the same as raising a number to the 1/2 power. You can type the expression using the caret (^) symbol. For example, the square root of 'x' can be entered as x^(1/2). For a specific number like 9, type 9^(1/2).
- Check for Syntax Errors: Make sure you have both opening and closing parentheses. A missing one will cause an error. Also, double-check that you aren't using any characters the system doesn't recognize. For nested operations, like the square root of an exponent, use braces: sqrt{x^2+4}.
- Consult the WebAssign Notation Guide: WebAssign has official student help docs with tons of examples. If you keep having issues, search for "WebAssign notation guide" or "calcPad help" from your course dashboard or the main WebAssign help site (WebAssign).
Prevention Tips
To avoid formatting headaches and save time later, keep these tips in mind.
- Master the Core Syntax: Memorize the basic WebAssign shorthand: ^ for exponents (like x^2), _ for subscripts (like H_2O), and sqrt() for square roots. Typing an alphabetic character or a space typically ends a superscript or subscript.
- Always Use the calcPad When Learning: For new students, it's best to rely on the visual calcPad toolbar to insert tricky notation like fractions, integrals, or Greek letters. It makes sure the correct syntax is generated for you. Remember to click the answer box to activate it—don't just navigate with your keyboard.
- Practice in a Sample Assignment: Lots of instructors provide a non-graded "Introduction to WebAssign" assignment. Use this to test how to enter square roots, intervals (like [0, 5)), and other notation before starting your graded work. It really helps prevent losing points on early assignments from simple formatting mistakes.
