Question

show that (7+√2) is the conjugate surd of the mixed quadratic surd (7-√2)
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Answer 1

Answer:

yeah!

Step-by-step explanation:

7+√2× 7-√2

using identity a2- b2 we get (a+b)(a-b)

7^2 -√2^2

49-2

47.

as we get a rational no(47) by multiplying 7+√2 by 7-√2

thus it is the rationalising factor or conjugate of 7-√2