If you're really asking "why", as in the title, we'd need to know the context to see the goal.View attachment 28536
How do I get this solution? I'm not sure as to what to do here
Do you understand distribution? [imath]a-(b-c) = a-b+c[/imath]. This is just the reverse of that.Why does the + become a - inbetween the two fractions?
Hi Mike. There are different ways to simplify the given expression algebraically. Dr. Peterson chose to associate the two fractions and then subtract them as a group, but he could have used a different approach, instead. When doing math, there are many personal choices available.Why does the + become a - inbetween the two fractions?
Your meaning is clear, Mike. I'd just pointed out that it's not necessary to start by changing that arithmetic operator. There are often many differing ways in beginning algebra to arrive at a particular result.I meant the following
Your meaning in that statement is not clear, Mike.I can see what you’ve don’t now.
1-a+b = 1-(a-b)
1 + -a + b is not a valid expression, please clarify what you mean.Isn’t 1 - a + b = 1 + -a + b
How did you know he meant 1 -(a+b)