Question

Find a and b :5÷7+3√2 =a-b√2

Answer 1

Step-by-step explanation:

after rationalising denominator of the given question we get

A = 35/31

B = 15/31

5/7+3√2

rationalsing its denominator

5 x 7-3√2

7+3√2 7-3√2

5 (7-3√2) = 5(7-3√2)

(7)^2 - (3√2)^2 49 - 18

5(7-3√2) = 35 - 15√2 = 35 - 15√2

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here, a-b√2 = 35 - 15√2

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A = 35 B = 15

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