Week 4 – radicals

This week in Math I learned how to add radicals.

Ex.  \sqrt{20}+6\sqrt5

We must simplify the radicals first.

=\sqrt{4*5}

Because we know the \sqrt4=2, we can move it to the outside of the radical.

=2\sqrt5

This is now the simplified version of \sqrt{20}

now we have 2\sqrt5+6\sqrt5

Because we have the same number inside the radical we can just add the coefficients.

So our final answer would be 8\sqrt5