SOLUTION: {{{ sqrt(12x^3) + sqrt(9x^3) - sqrt(81x^3) }}}

Algebra ->  Rational-functions -> SOLUTION: {{{ sqrt(12x^3) + sqrt(9x^3) - sqrt(81x^3) }}}      Log On


   

Question 714619: +sqrt%2812x%5E3%29+%2B+sqrt%289x%5E3%29+-+sqrt%2881x%5E3%29+
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
+sqrt%2812x%5E3%29+%2B+sqrt%289x%5E3%29+-+sqrt%2881x%5E3%29+
Factor to reveal the perfect squares inside the radicals
+sqrt%284%2A3%2Ax%5E2%2Ax%29+%2B+sqrt%289x%5E2%2Ax%29+-+sqrt%2881x%5E2%2Ax%29+
Extract those perfect square
+2x%2Asqrt%283x%29+%2B+3x%2Asqrt%28x%29+-+9x%2Asqrt%28x%29+
Combine the like terms
+2x%2Asqrt%283x%29 - 6x%2Asqrt%28x%29+