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(2√3+5)(√3-√5)

 Mar 1, 2015

Best Answer 

 #1
avatar+130516 
+5

Just using normal "FOIL"....we have...

(2√3+5)(√3-√5)

2√3 *√3 = 2*3  = 6

2√3 *(-√5)  = -2√15

5 * √3  = 5√3

5 * (-√5)  = -5√5

And combining  terms, we have

6- 2√15 + 5√3- 5√5

 

 Mar 1, 2015
 #1
avatar+130516 
+5
Best Answer

Just using normal "FOIL"....we have...

(2√3+5)(√3-√5)

2√3 *√3 = 2*3  = 6

2√3 *(-√5)  = -2√15

5 * √3  = 5√3

5 * (-√5)  = -5√5

And combining  terms, we have

6- 2√15 + 5√3- 5√5

 

CPhill Mar 1, 2015

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