plz solve fast please
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Answers
Answered by
5
ANSWER = -8√5
a = 9 - 4√5
(a - 1 / a ) = (9-4√5) - (1/(9-4√5))
= (9-4√5) -[ (9+4√5)/(9² - (4√5)²])
= (9-4√5) - (9+4√5) / (81-80)
= (9-4√5) - (9+4√5)
= 9- 4√5 - 9 - 4√5
= -2(4√5)
= -8√5
Formulas used
• (a+b)(a-b) = a² - b²
• -(a+b) = -a - b
• 1/(a-b) = (a+b)/(a²-b²)
Answered by
23
Answer:
kya kh rha ho ?
nhi khana kya chta ho
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