How do you evaluate (\sqrt{(3-1)^{2}+(8-0)^{2}?

1 Answer
Oct 19, 2017

sqrt(68)=2*sqrt(17)

Explanation:

sqrt((3-1)^2+(8-0)^2)

The way to simplify these expressions is to work inside out. First, I'll do the subtraction in the parentheses.

sqrt((2)^2+(8)^2)

Now, I'll compute each square.

sqrt(4+64)

Next, I'll add.

sqrt(68)

Then, I'll try to find perfect squares that are factors of the number in the radical. In this case, we can see that 68=4*17=2^2*17. Thus

sqrt(68)=sqrt(2^2*17)=sqrt(2^2)*sqrt(17)=2*sqrt(17)