rationalisation the question
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here's your answer it may help you
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OK let's get straight to the point....
Rationalising factor of 3 +√2 is 3 - √2......
Now, 1 × (3 - √2)/ (3 + √2) × (3 - √2)
Hence your answer is... 3 - √2/ (3)² - (√2)²
SD (a+b)(a-b) = a² - b²
Hence the answer is 3 - √2 / 7
Hope it helps .
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