Question 131045
Let's see if we can "unconflict" you!
Multiply:
{{{(3sqrt(7)-6sqrt(3))*(4sqrt(7)+8sqrt(3))}}} Use the FOIL method.
{{{(3*4*sqrt(7)sqrt(7))+highlight((3*8sqrt(7)sqrt(3)))-highlight((6*4sqrt(7)sqrt(3)))-(6*8sqrt(3)sqrt(3))}}} Simplify. Keep your eye on the two middle terms!
{{{12(7)+highlight(24sqrt(7)sqrt(3))-highlight(24sqrt(7)sqrt(3))-48(3)}}}...as you can see, they drop out, leaving you with...
{{{12(7)-48(3)}}}
{{{84-144 = -60}}}