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CBSE Class 9 Answered

f i n d space t h e space v a l u e space o f space 249 squared minus 248 squared space a n d space a l s o space f a c t o r i s e space open parentheses 25 x squared minus 1 close parentheses plus open parentheses 1 plus 5 x close parentheses squared
Asked by kishor.kp14 | 26 Jun, 2019, 03:49: PM
answered-by-expert Expert Answer
begin mathsize 16px style We space know space that comma straight a squared space minus space straight b squared space equals space open parentheses straight a space minus straight b close parentheses open parentheses straight a space plus space straight b close parentheses space rightwards double arrow 249 squared space minus space 248 squared equals space left parenthesis 249 space minus space 248 right parenthesis left parenthesis 249 space plus space 248 right parenthesis space equals space 1 cross times space 497 equals space 497 end style
 
 
(25x2 - 1)+(1 + 5x)2
= [(5x)2 - 12 ] +(1 + 5x)2
= (5x + 1)(5x - 1) + (1 + 5x)2               .
= (5x + 1)[(5x - 1) + (5x + 1)]
=(5x + 1)10x 
Answered by Yasmeen Khan | 26 Jun, 2019, 04:15: PM

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