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ICSE Class 9 Answered

1. 5-(3x^2-2x)(6-3x^2+2x)
2, (a^2-a)(4a^2-4a-5)-6
 
Asked by pereiracalida | 01 Jun, 2017, 06:54: PM
answered-by-expert Expert Answer
begin mathsize 14px style 5 minus open parentheses 3 straight x squared minus 2 straight x close parentheses open parentheses 6 minus 3 straight x squared plus 2 straight x close parentheses equals 5 minus open parentheses 3 straight x squared minus 2 straight x close parentheses open square brackets 6 minus open parentheses 3 straight x squared minus 2 straight x close parentheses close square brackets Taking space open parentheses 3 straight x squared minus 2 straight x close parentheses equals straight a comma space we space have 5 minus straight a open parentheses 6 minus straight a close parentheses equals 5 minus 6 straight a plus straight a squared equals straight a squared minus 6 straight a plus 5 equals straight a squared minus 5 straight a minus straight a plus 5 equals straight a open parentheses straight a minus 5 close parentheses minus 1 left parenthesis straight a minus 5 right parenthesis equals left parenthesis straight a minus 5 right parenthesis left parenthesis straight a minus 1 right parenthesis equals open parentheses 3 straight x squared minus 2 straight x minus 5 close parentheses open parentheses 3 straight x squared minus 2 straight x minus 1 close parentheses equals open parentheses 3 straight x squared minus 5 straight x plus 3 straight x minus 5 close parentheses open parentheses 3 straight x squared minus 3 straight x plus straight x minus 1 close parentheses equals open square brackets straight x open parentheses 3 straight x minus 5 close parentheses plus 1 open parentheses 3 straight x minus 5 close parentheses close square brackets open square brackets 3 straight x open parentheses straight x minus 1 close parentheses plus 1 open parentheses straight x minus 1 close parentheses close square brackets equals open square brackets open parentheses 3 straight x minus 5 close parentheses open parentheses straight x plus 1 close parentheses close square brackets open square brackets open parentheses straight x minus 1 close parentheses open parentheses 3 straight x plus 1 close parentheses close square brackets equals open parentheses straight x minus 1 close parentheses open parentheses straight x plus 1 close parentheses open parentheses 3 straight x minus 5 close parentheses open parentheses 3 straight x plus 1 close parentheses Note colon Please space post space one space query space at space straight a space time. end style
Answered by Rashmi Khot | 02 Jun, 2017, 09:47: AM

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