Difference of Two Squares Calculator
𝑥 Algebra. Use the Difference of two squares formula to find a² − b², a, b: pick the value you want, type the others, and the answer updates as you go.
a² − b²40
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| a² − b² | no unit |
| a | no unit |
| b | no unit |
Worked example
Find the a² − b² when a = 7, b = 3.
Using a² - b² = (a + b)(a - b): a² − b² = 40.
Frequently asked questions
What is the formula for Difference of two squares?
a² - b² = (a + b)(a - b).
What do the letters stand for, and what units are used?
a² − b², a, b.
How do you calculate a² − b²?
Put the values into a² - b² = (a + b)(a - b). For example, with a = 7, b = 3, a² − b² = 40.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (a² − b², a, b) and fill in the others: it rearranges the formula for you.
