SOLUTION: 3x2-y2 for x=1/2 y=-1/3

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Question 414384: 3x2-y2
for x=1/2
y=-1/3
Answer by jsmallt9(3758) About Me  (Show Source):
You can put this solution on YOUR website!
I'm guessing that the 2's are exponents. If this is correct, please use the "^" character to indicate exponents:
3x^2-y^2

I'm also guessing the problem is to evaluate the expression when x = 1/2 and y = 1/3. To do this we just substitute the values for x and y and use the order of operations (aka PEMDAS) to simplify:
3x%5E2-y%5E2
3%281%2F2%29%5E2-%281%2F3%29%5E2
Note the use of parentheses. This is a good habit whenever you are substituting one expression for another.
Next, according to the order of operations we should exponentiate:
3%281%2F4%29-%281%2F9%29
Next, multiply:
3%2F4-1%2F9
and last, subtract. Since these are fractions we need common denominators:
%283%2F4%29%289%2F9%29-%281%2F9%29%284%2F4%29
27%2F36-4%2F36
23%2F36