Question 222696
how do you do the square root of 18 plus 2 times the square root of 80
:
{{{sqrt(18) + 2*sqrt(80)}}}
Factor inside the radicals to reveal the perfect squares
{{{sqrt(9*2) + 2*sqrt(16*5)}}}
extract the square roots
{{{3*sqrt(2) + 2*4*sqrt(5)}}}
{{{3*sqrt(2) + 8*sqrt(5)}}}; about all you can do with it