(√7 + √ 5)2 maps into which identity?, (a-b)2, (a+b)2, (√5 - √6)2 maps into which identity, (a-b)2, (a+b)2, What is the rationalising factor of 1/7√3, 3, √3, What is the rationalising factor of 2 / ( √7 + √3), ( √7 + √3), ( √7 - √3), (7 +5) (7-5) = ??, 25, 24

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