Question

7+3√5 upon 7-3√5

please help guys fastttttt!!!​

Answer 1

Answer:

(7+3$\sqrt{5}$) /(7-3$\sqrt{5}$)  =  (7+3$\sqrt{5}$)x(7+3$\sqrt{5}$) / (7-3$\sqrt{5}$)x(7+3$\sqrt{5}$)

                           =  49+45+42$\sqrt{5}$ /  49 - 45

                           =   94 + 42$\sqrt{5}$ / 4

Answer 2

Answer:

47 - 21√5/2

Step-by-step explanation:

7 + 3√5/7-3√5 = (7 + 3√5/7 - 3√5) × (7 + 3√5/7 + 3√5)

= (7)² + 2(7)(3√5) + (3√5)²/(7)² - (3√5)²

= 49 + 45 + 42√5/49 - 45

= 94/4 - 42√5/4

= 47 - 21√5/2

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