Rationalize the denominator root 7 - 2 / root 7 + 2 = a root 7 + b
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√7 - 2 / √ 7+2= a√7+b
√7-2/√7+2×√7-2/√7-2=a√7+b
7+4-4√7/7-4=a√7+b
11-4+√7/3=a√7+b
7+√7/3=a√7+b
7/3=b
√7/3=a√7
-3=a
- 7/3=b
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