rationalize the denominator 1/√7+√2
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Answered by
4
Answer:
We use the identity (a+
b
)(a−
b
)=a
2
−b.
Multiply and divide
7
−2
1
by
7
+2 to get
7
−2
1
×
7
+2
7
+2
=
7−4
7
+2
=
3
7
+2
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