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CBSE Class 8 Answered

Simplify (5x² + 2y²)² - (5x²- 2y²)²
Asked by Shawn | 10 Mar, 2016, 03:31: PM
answered-by-expert Expert Answer
begin mathsize 14px style left parenthesis 5 straight x ² space plus space 2 straight y ² right parenthesis ² space minus space left parenthesis 5 straight x ² minus space 2 straight y ² right parenthesis ² This space is space in space the space form space of space identity space straight a squared minus straight b squared equals open parentheses straight a minus straight b close parentheses open parentheses straight a plus straight b close parentheses therefore left parenthesis 5 straight x ² space plus space 2 straight y ² right parenthesis ² space minus space left parenthesis 5 straight x ² minus space 2 straight y ² right parenthesis ² equals open square brackets open parentheses 5 straight x ² space plus space 2 straight y ² close parentheses minus left parenthesis 5 straight x ² minus space 2 straight y ² right parenthesis close square brackets open square brackets open parentheses 5 straight x ² space plus space 2 straight y ² close parentheses plus left parenthesis 5 straight x ² minus space 2 straight y ² right parenthesis close square brackets equals open parentheses 4 straight y squared close parentheses open parentheses 10 straight x squared close parentheses equals 40 straight x squared straight y squared end style
Answered by Priti Shah | 10 Mar, 2016, 05:31: PM

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