Embed the Difference of Two Squares

Factors a² − b² into (a + b)(a − b), multiplied back out as a check — and the mental shortcut it gives for products either side of a round number. Set the values it should open on, then copy the iframe. Your visitors can change them; the widget recomputes against Rule Calculator and never touches your page.

Opening values

Set what the widget shows before anyone touches it. Leave a field as it is and it stays out of the URL.

First term (a)Second term (b)Height — 680px

Preview

Paste this

<iframe src="https://rulecalculators.com/embed/difference-of-two-squares" width="100%" height="680" style="border:1px solid #e5e5e5;border-radius:12px" loading="lazy" title="Difference of Two Squares"></iframe>
<p style="font:13px/1.5 system-ui,sans-serif;color:#666;margin:6px 0 0"><a href="https://rulecalculators.com/calc/difference-of-two-squares" style="color:#666">Difference of Two Squares</a> by <a href="https://rulecalculators.com" style="color:#666">Rule Calculator</a></p>

Free for commercial use. The one condition is the credit link inside the widget, which is how the calculator stays free. Want the numbers in your own markup instead? The same calculator is a JSON endpoint, or see the full Difference of Two Squares page with its sources and working.