3-root7 whole to the power of 2 rationalise – InterviewSolution

1.

3-root7 whole to the power of 2 rationalise

Answer»

Answer:

16 - 6√7

Step-by-step explanation:

1) (3 - √7)², USING (a - B)² = a² + b² - 2ab Identity.

2) 3² + (√7)² - 2(3)(√7) = 9 + 7 - 6√7 = 16 - 6√7

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