How do you simplify 5√80−12√5?

1 Answer
Ricardo A.
Aug 14, 2016

8√5

Explanation:

√80=√4⋅4⋅5 Notice that there are two 4s in there, so, since it is a square root we can write that same thing as 4√5 so the equation now becomes:
5⋅(4√5)−12√5
5⋅4=20 so
20√5−12√5 From here we can treat √5 as x like: 20x−12x=8x so,
20√5−12√5=8√5

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