write the rationalising factor of the denominator of the following: 1/√7-2
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Answer:
√7+2 is the answer
Step-by-step explanation:
to rationalize
1/√7-2 * ✓7+2/√7+2
√7+2/(√7)²-2² (a²-b²)
=√7+2/7-4
=√7+2/3
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