Question

give step by step explanation and tell if the number in the picture is rational or irrational
please give step by step answer​

Answer 1

(a+b)^2= a^2+b^2+2ab

SO HERE a is √7 and b is √2

PUTTING IT IN THE FORMULA

(√7)^2 + (√2)^2 +2(√7)(√2)

7+2+2√14

9+2√14

THE NUMBER IS IRRATIONAL

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