Q2 (a) Find value of a and b
√7-2/√7+2
= a√7 + b
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Answer:
Answer
7
+2
7
−2
=a
7
+b....(1)
By rationalising L.H.S,
7
+2
7
−2
×
7
−2
7
−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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