Answer:
The student has considered the value of x as [tex]9\dfrac{1}{2}[/tex] in place of [tex]-9\dfrac{1}{2}[/tex]
Step-by-step explanation:
As per the given condition that a student evaluated - 4 + x for the value of [tex]x = -9\dfrac{1}{2}[/tex] and he has got an answer of [tex]-5\dfrac{1}{2}[/tex].
He has done a mistake while calculating the value of (- 4 + x) because the right answer will be [tex]-4+(-9\dfrac{1}{2} ) = -4 - 9\dfrac{1}{2} = -13\dfrac{1}{2}[/tex].
Actually the student has considered the value of x as [tex]9\dfrac{1}{2}[/tex] in place of [tex]-9\dfrac{1}{2}[/tex] i.e. he has omitted the negative sign. (Answer)
