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Q. Two students while solving a quadratic equation in x, one copied the constant term incorrectly and got the roots as 3 and 2. The other copied the constant term and coefficient of `x^2` as `-6` and 1 respectively. The correct roots are :A. 3, -2B. `-3, 2`C. `-6, -1 `D. `6, -1` |
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Answer» Correct Answer - D Let quandratic equation `x^(2)+bx-6=0` ltBrgt `overset("constant term = wrong")overset(downarrow)("wrong roots=3, 2")` but sum of roots = 3+2 It means, 3+2 = `(-b)/(1)` b = -5 correct `rArrx^(2)-5x-6=0` ltBrgt (x+1)(x-6)=0 x=-1, 6 roots |
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