How do you subtract #9/(x^2-9) - 5/ (x+3)#?
1 Answer
I have shown every step in 'over the top' detail so you can see where everything comes from.
Explanation:
When presented with questions you look for links which means you have to build up a 'toolbox' of remembered facts and techniques:
Given:
Consider
But
Substitute (3) into (2) giving:
But
Substitute (4) into (1) giving:
Now both denominators have something in common so we can combine them
but
substituting (6) into (5) and rewriting the expression gives:
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