Question 574554
Simplify:
{{{-3sqrt(180)-7sqrt(45)}}} First, rewrite both radicands.
{{{-3sqrt(36*5)-7sqrt(9*5)}}} Now take the square root of the perfect squares: {{{sqrt(36) = 6}}} and {{{sqrt(9) = 3}}} so...
{{{-3*6sqrt(5)-7*3sqrt(5)}}} Simplify.
{{{-18sqrt(5)-21sqrt(5)}}} Combine.
{{{-39sqrt(5)}}}