IF
a²-4a-1,a#0,Find a²+1/a²
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Answer:
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Answered by
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Step-by-step explanation:
a
2
−4a−1=0
⇒
a
a
2
−1
=4⇒a−
a
1
=4
Now, a
2
+3a+
a
2
1
=
a
3
=a
2
+
a
2
1
+3(a−
a
1
)=(a−
a
1
)
2
+2+3(a−
a
1
)
=4
2
+2+3×4=30.
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