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7.Show that the polynomials given below have no real zeroes:(ii) x2 +6x+ 10(2) x2- 2x +5 |
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Answer» 1) x^2-2x+5It is of form Ax^2+Bx+c where A= 1, B=-2, C=5B^2-4AC= (-2)^2-(4*5)=4-20=-16the value is negative , hence it has no zeroes2) x^2+6x+10It is of form Ax^2+Bx+c where A= 1, B=6, C=10B^-4AC= 6^2-(4*1*10)=36-40=-4the value is negative , hence it has no zeroesLike if you find it useful |
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