(√2+√3) - (√2-√3)
(√2+√3) - (√2-√3)
You forgot to cut and paste your work and answer like the site rules require.
my attempt:
(√2+√3) - (√2-√3)
=(√2+√3)^2 - (√2-√3)^2
=2+√3-2-√3
=2√3
Very interesting - every line of your work is incorrect, and yet you stumbled into the correct answer!
Starting with:
Eliminate the parentheses, being careful to watch signs:
So like I said, you ended up with the correct answer. Now here's why your approach is all wrong:
1. First, does not equal . This is like saying that .
2. Next,
3. Your third line is equivalent to zero: it's equivalent to a + b - a - b = 0
So I have no idea how you got the correct final answer, unless perhaps you copied it from an answer key?
Post back if you have additional questions about this.
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