Answer:
To evaluate the expression
when and , we can substitute the given values of and into the expression and then simplify the calculations step by step.
Given:
Substitute the values of and into the expression:
Simplify inside the parentheses first:
Now, evaluate
:
Finally, perform the addition to get the final result:
Therefore, the value of the expression
when m=7 and n=5 is 20.
Step-by-step explanation: