Solve :
plz answer fast
Attachments:
Answers
Answered by
2
Step-by-step explanation:
= (7+3√5)/(3+√5) - (7-3√5)/(3-√5)
= [ (7+3√5)(3-√5) - (7-3√5)(3+√5) ]/(3² - √5²)
= [ 21 - 7√5+9√5 - 15 - 21-7√5 +9√5+15)] /(9-5)
= ( 18√5 - 14√5)/4
= 4√5/4
= √5
Answered by
1
Answer:
√5
Step-by-step explanation:
(7+3√5)/(3+√5) - (7-3√5)/(3-√5)
(7+3√5)(3-√5) - (7-3√5)(3+√5)/(3-√5)(3+√5)
3(7+3√5)-√5(7+3√5) - {3(7-3√5)+√5(7-3√5)/(3²)-(√5)²
21+9√5-7√5-15 - {21-9√5+7√5-15)/(9-5)
21+9√5-7√5-15 - 21+9√5-7√5+15)/(9-5)
(18√5-14√5)/4
4√5/4
√5
Similar questions