Answer:
A) -4
Explanation:
Question

Solution
Substitute the given values of m and n into the original expression:

Carry out the operation in the brackets first


Now carry out the operation in the numerator


Dividing by a fraction is the same as multiplying by the flipped version of the fraction (flipped = swap the numerator and denominator of the fraction we are dividing by):

To multiply a fraction, simply multiply the numerators and multiply the denominators:

Finally simplify:
