How to use Wolfram Alpha Pro?? It keeps giving me wrong answers.

Is there a tutorial as to how to put in certain algebra problems in? I have the key for answers but the answers are not matching up. I check the input and it’s correct. Now, on a few questions I don’t think I’m entering stuff right. for example questions such as find where f(x) =g(x) with the equation. there are so many questions I have but there isn’t even a search box where i can find help . I’m desperate for some help. Thank you to anyone that can help.

An example might help.

Under the entry slot is a link labeled Examples.

That opens a page of topics for which there are examples prepared.

Clicking the Algebra link opens a page with many examples of entering algebra problems,

http://www.wolframalpha.com/examples/Algebra.html

If the Examples don’t help, you can ask Wolfram|Alpha staff via the “Give us your feedback” slot at the bottom of an output page,
or by email to info@wolframalpha.com . (Email would let you attach a screen shot. The feedback slot automatically includes the input line.)
As Priyan said, a specific example is valuable.

Let f(x)=2x?2 and g(x)=2x+2 and find x if

a. f(x)+g(x)=43
b. f(x)g(x)=4
c. f(x)=g(x)

Thank you for the replies. Here is an example . I appreciate the help !

I also put this in and got an answer different from the key. ^3?-27a^15b^9
my key says answer is -3a^5b^9 but Wolfram gave me -14348907a^5b^9

Solve[(2 x - 2) + (2 x + 2) == 43, x]
Solve[(2 x - 2)*(2 x + 2) == 4, x]
Solve[(2 x - 2) == (2 x + 2), x]

This is how I’d input this in to Wolfram Alpha or Mathematica. I had a look at the solutions and they seem correct:

1st Answer: x=43/3
2nd Answer: x=-Root(2) or x=+Root(2)
3nd Answer: No solution exists

How do we differentiate which category we get step by step answers in wolfram pro

Thank you for the help. Wolfram is still just complicated to me. It has been a struggle. Thank you again