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CBSE Class 10 Answered

<div>DEAR</div> <div>&nbsp;</div> <div>PLS SOLVE THE ATTACHED 3 QUES. OF MATHS</div> <div>&nbsp;</div> <div><img src="https://images.topperlearning.com/topper/tinymce/imagemanager/files/ea04112987ccb4acc04895e9907e01b9576503e92b6900.93621140P6180005.JPG" alt="" /></div>
Asked by yashpalguglani | 18 Jun, 2016, 01:49: PM
Expert Answer
begin mathsize 12px style Kindly space ask space only space 1 space question space at space straight a space time.
1. space Since space 2 space is space the space zero space of space the space polynomial comma space straight f left parenthesis 2 right parenthesis space equals space 0
rightwards double arrow straight a left parenthesis 2 right parenthesis squared minus 3 left parenthesis straight a minus 1 right parenthesis left parenthesis 2 right parenthesis minus 1 equals 0
rightwards double arrow 4 straight a minus 6 straight a plus 6 minus 1 equals 0
rightwards double arrow 2 straight a equals 5
rightwards double arrow straight a equals 5 over 2
2. space Since space the space zeroes space are space reciprocals comma space
rightwards double arrow fraction numerator 6 straight a over denominator straight a squared plus 9 end fraction equals 1
rightwards double arrow 6 straight a equals straight a squared plus 9
rightwards double arrow straight a squared minus 6 straight a plus 9 equals 0
rightwards double arrow left parenthesis straight a minus 3 right parenthesis left parenthesis straight a minus 3 right parenthesis equals 0
rightwards double arrow straight a equals 3

3. space Since space the space zeroes space are space reciprocals comma space
rightwards double arrow straight k over 2 equals 1
rightwards double arrow straight k equals 2
end style
Answered by Rebecca Fernandes | 19 Jun, 2016, 07:28: AM
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