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CBSE Class 10 Answered

Asked by chhatrapalsingh505 | 06 Aug, 2021, 03:44: PM
Expert Answer
straight f left parenthesis straight x right parenthesis equals 2 straight x cubed plus straight x squared minus 5 straight x plus 2
straight f open parentheses 1 half close parentheses equals 2 open parentheses 1 half close parentheses cubed plus open parentheses 1 half close parentheses squared minus 5 open parentheses 1 half close parentheses plus 2 equals 0.... hence space 1 divided by 2 space is space straight a space zero
straight f open parentheses 1 close parentheses equals 2 open parentheses 1 close parentheses cubed plus open parentheses 1 close parentheses squared minus 5 open parentheses 1 close parentheses plus 2 equals 0.... hence space 1 space is space straight a space zero
straight f open parentheses negative 2 close parentheses equals 2 open parentheses negative 2 close parentheses cubed plus open parentheses negative 2 close parentheses squared minus 5 open parentheses negative 2 close parentheses plus 2 equals 0.... hence space minus 2 space is space straight a space zero

straight alpha equals space 1 half
straight beta equals 1
straight gamma space equals negative 2
straight alpha plus straight beta plus straight gamma space equals fraction numerator negative straight b over denominator straight a end fraction equals space fraction numerator negative 1 over denominator 2 end fraction
1 half plus 1 minus 2 equals fraction numerator negative 1 over denominator 2 end fraction

αβ plus αγ plus βγ equals straight c over straight a equals fraction numerator negative 5 over denominator 2 end fraction
1 half open parentheses 1 close parentheses plus 1 half open parentheses negative 2 close parentheses plus 1 open parentheses negative 2 close parentheses equals fraction numerator negative 5 over denominator 2 end fraction

αβγ equals fraction numerator negative straight d over denominator straight a end fraction equals fraction numerator negative 2 over denominator 2 end fraction equals negative 1
1 half cross times 1 cross times negative 2 equals negative 1
Answered by Arun | 12 Aug, 2021, 10:09: AM
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