Please tell the answer of this one
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varaddaithankar:
2root5 and 3root2
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Answered by
1
Answer:
a² + 1/a² = 18
a² + 1/a² + 2a(1/a) = 18 + 2
(a + 1/a)² = 20
a + 1/a = 2√5
a² + 1/a² - 2a(1/a) = 18 - 2
(a - 1/a)² = 16
a - 1/a = 4
Answered by
0
(a+1/a)^2=a^2+1/a^2+2
a+1/a=√{18+2)=√20
(a-1/a)^2=18-2
a-1/a=+4,-4
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