Question

find the product of 1+3√2 and 1-3√2.is this product a rational or irrational?

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Answer 1

Step-by-step explanation:

(1+3√2) (1-3√2)

W.K.T. (a+b)(a-b)=a^2-b^2

Here a=1,b=3√2

(1+3√2)(1+3√2)=1^2-(3√2)^2=1-18= -17

-17 can also be written as -17/1

•°• The product of 1+3√2and1-3√2 is a rational number.