if a²+9/a²=31. find the positive value of a-3/a?
Answers
Answered by
3
Step-by-step explanation:
Given: a
2
+
a
2
9
=31
To find →a−
a
3
(a−
a
3
)
2
=a
2
+
a
2
9
−2(a)(
a
3
)
(a−
a
3
)
2
=31−6
(a−
a
3
)
2
=25
a−
a
3
=±5.
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