How do you evaluate #3x^2-4y^2# if #x=5# and #y=3#?
1 Answer
Jun 7, 2017
The answer is
Explanation:
So, we start with the original problem:
Then we substitute the given
Now, according to the order of operations, we simplify the exponential powers first, thus, reducing the expression to this:
Then, we use the order of operations again and do the multiplication next:
We then use the order of operations a final time and finish off the expression with subtraction: