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(5+ √5) (5-√5)help please​

Answer» <html><body><p><strong>Step-by-step <a href="https://interviewquestions.tuteehub.com/tag/explanation-455162" style="font-weight:bold;" target="_blank" title="Click to know more about EXPLANATION">EXPLANATION</a>:</strong></p><p><img align="absmiddle" alt="5(5 - \sqrt{5)} + \sqrt{5} (5 - \sqrt{5)} \\ 25 - 5 \sqrt{5} + 5 \sqrt{5} - 5 \\ 25 - 5 \\ 20" class="latex-formula" id="TexFormula1" src="https://tex.z-dn.net/?f=5%285%20-%20%20%5Csqrt%7B5%29%7D%20%2B%20%20%5Csqrt%7B5%7D%20%285%20-%20%20%5Csqrt%7B5%29%7D%20%20%5C%5C%2025%20-%205%20%5Csqrt%7B5%7D%20%20%2B%205%20%5Csqrt%7B5%7D%20%20-%205%20%5C%5C%2025%20-%205%20%5C%5C%2020" title="5(5 - \sqrt{5)} + \sqrt{5} (5 - \sqrt{5)} \\ 25 - 5 \sqrt{5} + 5 \sqrt{5} - 5 \\ 25 - 5 \\ 20"/></p><p></p></body></html>


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