rationalize the following
√7-2/√7+2 = a√7+b
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Step-by-step explanation:
7
+2
7
−2
=a
7
+b....(1)
By rationalising L.H.S,
7
+2
7
−2
×
7
−2
7
−2
=
7
2
−2
2
(
7
−2)
2
=
7−4
7+4−4
7
=
3
11−4
2
....(2)
Compairing (1) and(2):
a=
3
−4
and b=
3
11
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