SOLUTION: Multiplty. (3√5-9√7)(2√5+6√7)

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Question 331561: Multiplty. (3√5-9√7)(2√5+6√7)
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
%283sqrt%285%29-9sqrt%287%29%29%282sqrt%285%29%2B6sqrt%287%29%29foil


multiply


%286sqrt%2825%29%29%2B%2818sqrt%2835%29%29%2B%28-18sqrt%2835%29%29-%2854sqrt%2849%29%29 factor and cancel


%286%2A5%29%2Bcross%2818sqrt%2835%29%29%2Bcross%28-18sqrt%2835%29%29-%2854%2A7%29%29


%286%2A5%29-%2854%2A7%29 multiply


%2830%29-%28378%29 subtract


highlight%28-348%29