If a, b are rational numbers and ( a − 1) √2

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If a, b are rational numbers and ( a − 1) √2 + 3 = b√2 + a , the value of (a + b) is

(a − 1)√2 + 3 = b√2 + a
⇒ a = 3 ; a – 1 = b
⇒ 3 – 1 = b ⇒ b = 2
∴ a + b = 3 + 2 = 5