Question

a=√2+7;b=√2-7;x=a+b,y=a-b​

Answer 1

Answer:

$a = \sqrt{2 } + 7 \\ \\ b = \sqrt{2} - 7$

$1)x = a + b \\ \\ \: \: \: \: x = \sqrt{2 } + 7 + \sqrt{2} - 7 \\ \\ \\ \: \: \: x = 2 \sqrt{2}$

$2)y = a - b \\ \\ \: \: y = \sqrt{2} + 7 - \sqrt{2} + 7 \\ \\ \: \: \: y = 14$

Answer 2

Step-by-step explanation:

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