(7a-9b)(7a-9b) = ? using identity(a-b²)= a²-2b+b²____________a = 7a B = 9b

(7a-9b)(7a-9b) = ? using identity(a-b²)= a²-2b+b²____________a = 7a

1.	(7a-9b)(7a-9b) = ? using identity(a-b²)= a²-2b+b²____________a = 7a B = 9b
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>(<a href="https://interviewquestions.tuteehub.com/tag/7a-336072" style="font-weight:bold;" target="_blank" title="Click to know more about 7A">7A</a>-<a href="https://interviewquestions.tuteehub.com/tag/9b-343168" style="font-weight:bold;" target="_blank" title="Click to know more about 9B">9B</a>)^<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a></p><p>(7a)^2 -2(7a)(9b) +(9b)^2</p><p>49a^2 -126ab +81b^2</p></body></html>