Why does he turn the sqaure root of 2^2 +2^2 into sqaure root of 2^2 (1+1) ? And is this the only situation where you’d hold do something like that?
#surds
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Why does he turn the sqaure root of 2^2 +2^2 into sqaure root of 2^2 (1+1) ? And...
He took a factor of 2^2 to simplify it and just make it easier to calculate the square root