1.

यदि `x^(2)+5x+6=0` हो तो `(2x)/(x^(2)-7x+6)` का मान बताइए?A. `1/6`B. `1/3`C. `-1/6`D. `-1/3`

Answer» Correct Answer - C
If `x^(2)+5x+6=0`
then `x^(2)+6=-5x`
so, ltbgt `(2x)/(x^(2)-7x+6)=(2 x)/(x^(2)+6-7x)`
`=(2x)/(-5x-7x+6)=(2x)/(x^(2)+6-7x)`
`=(2x)/(-5x-7x)=(2x)/(-12x)=(-1)/6`


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