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ICSE Class 8 Answered

sir , Factorise:- (1) 49xcube - 36x (2) PsquareQsquareR-16Rcube
Asked by gpjain11 | 18 Jan, 2016, 06:32: PM
answered-by-expert Expert Answer

begin mathsize 14px style 1 right parenthesis space 49 x cubed minus 36 x equals x left parenthesis 49 x squared minus 36 right parenthesis equals x left square bracket left parenthesis 7 x right parenthesis squared minus left parenthesis 6 right parenthesis squared right square bracket equals x left square bracket left parenthesis 7 x minus 6 right parenthesis left parenthesis 7 x plus 6 right parenthesis right square bracket equals x left parenthesis 7 x minus 6 right parenthesis left parenthesis 7 x plus 6 right parenthesis end style

begin mathsize 14px style P squared Q squared R minus 16 R cubed equals R open parentheses P squared Q squared minus 16 R squared close parentheses equals R open square brackets open parentheses P Q close parentheses squared minus open parentheses 4 R close parentheses squared close square brackets equals R open square brackets open parentheses P Q minus 4 R close parentheses open parentheses P Q plus 4 R close parentheses close square brackets equals R left parenthesis P Q minus 4 R right parenthesis left parenthesis P Q plus 4 R right parenthesis end style

Answered by | 18 Jan, 2016, 06:36: PM

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