Math, asked by sahil909, 1 year ago

7+3√5/3+√5 + 7-3√5/3-√5

Answers

Answered by ShuchiRecites
2
Hello Mate!

 \frac{7 + 3 \sqrt{5} }{3 +  \sqrt{5} }  \times  \frac{3 -  \sqrt{5} }{3 -  \sqrt{5} }  \\  =  \frac{21 - 7 \sqrt{5} + 9 \sqrt{5} - 15  }{9 - 5}  \\  =  \frac{6  +  2 \sqrt{5} }{4}  =  \frac{3  +  \sqrt{5} }{2}
 \frac{3 +  \sqrt{5} }{2}  +  \frac{3 -  \sqrt{5} }{2}  \\  \frac{3 +  \sqrt{5}  + 3 -  \sqrt{5} }{2}  =  \frac{6}{2}  \\  = 3

 \frac{7 - 3 \sqrt{5} }{3 -  \sqrt{5} }  \times  \frac{3 +  \sqrt{5} }{3 +  \sqrt{5} }  \\  =  \frac{21 + 7 \sqrt{5}  -  9 \sqrt{5}   - 15}{9 - 5}  \\  =  \frac{6 - 2 \sqrt{5} }{4}  =  \frac{3 -  \sqrt{5} }{2}

Hope it helps☺!✌
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