English, asked by anuraktakumar999, 2 months ago

If x = 9 + 7√2, y = 11 -5 √2 then find x(x + y)

Answers

Answered by vishal10012005

0

Explanation:

x(x+y) = x^2 + xy

[x = 9+7√2 , y = 11-5√2]

= (9+7√2)^2 + (9+7√2)(11-5√2)

= 81 + 126√2 + 98 + 99 - 45√2 + 77√2 - 70

= 208 + 158√2

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