Question

Please help ODNEJEJHR IKR SCI HI RHO DIO GO​

Answer 1

The student has considered the value of x as
`9(1)/(2)` in place of
`-9(1)/(2)`

Explanation:

As per the given condition that a student evaluated - 4 + x for the value of
`x = -9(1)/(2)` and he has got an answer of
`-5(1)/(2)`.

He has done a mistake while calculating the value of (- 4 + x) because the right answer will be
`-4+(-9(1)/(2) ) = -4 - 9(1)/(2) = -13(1)/(2)`.

Actually the student has considered the value of x as
`9(1)/(2)` in place of
`-9(1)/(2)` i.e. he has omitted the negative sign. (Answer)