Question

Evaluate the expression for a = 2 and b = 5. 100 20 50 625

Answer 1

What is the expression?

In the expression, just replace every a with 2 and every b with 5. 
Then you can sole it from there.

Answer 2

just replace every a with a 2 and do the correct pemdas and replace every b with a 5 and do the correct pemdas