SOLUTION: multiply (5sqrt5-15sqrt7)(2sqrt5+6sqrt7)

Algebra ->  Rational-functions -> SOLUTION: multiply (5sqrt5-15sqrt7)(2sqrt5+6sqrt7)      Log On


   

Question 337209: multiply (5sqrt5-15sqrt7)(2sqrt5+6sqrt7)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the FOIL method,

%285sqrt%285%29-15sqrt%287%29%29%282sqrt%285%29%2B6sqrt%287%29%29=10%2A5-90%2A7
%285sqrt%285%29-15sqrt%287%29%29%282sqrt%285%29%2B6sqrt%287%29%29=50-630
%285sqrt%285%29-15sqrt%287%29%29%282sqrt%285%29%2B6sqrt%287%29%29=-580