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CBSE Class 10 Answered

Verify that numbers given alongside of the cubic polynomials below are their zeroes. Also, verify the relationship between zeroes and the co-efficients in each case:   2y3 – 5y – 19y + 42; -3, 2, 7/2.
Asked by miniprasad | 02 Jun, 2018, 07:58: PM
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begin mathsize 16px style straight f left parenthesis straight x right parenthesis equals 2 straight y cubed space – space 5 straight y space – space 19 straight y space plus space 42 straight f left parenthesis negative 3 right parenthesis equals 60..... not space straight a space zero straight f left parenthesis 2 right parenthesis equals 1 0..... not space straight a space zero straight f open parentheses 7 over 2 close parentheses equals 175 over 4..... not space straight a space zero end style
Answered by Arun | 04 Jun, 2018, 12:49: PM

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