SOLUTION: (sqrt of 12 - sqrt of 5)(sqrt of 5 + 2 times sqrt of 12) using the FOIL method..sorry I don't know how to do the sqrt sign with the keyboard.

Algebra ->  Square-cubic-other-roots -> SOLUTION: (sqrt of 12 - sqrt of 5)(sqrt of 5 + 2 times sqrt of 12) using the FOIL method..sorry I don't know how to do the sqrt sign with the keyboard.      Log On


   

Question 199977This question is from textbook Beginning Algebra
: (sqrt of 12 - sqrt of 5)(sqrt of 5 + 2 times sqrt of 12)
using the FOIL method..sorry I don't know how to do the sqrt sign with the keyboard. This question is from textbook Beginning Algebra

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
%28sqrt%2812%29+-+sqrt%285%29%29%2A%28sqrt%285%29+%2B+2%2Asqrt%2812%29%29
FOIL
sqrt%2860%29+%2B+2%2812%29+-+5+-+2%2Asqrt%2860%29
Combine like terms
24+-+5+%2B+sqrt%2860%29+-+2%2Asqrt%2860%29
:
19+-+sqrt%2860%29
Factor inside the radical to reveal the perfect square
19+-+sqrt%284%2A15%29
extract the square root of 4
19+-+2sqrt%2815%29