Discussion

Explanation:

Given, 22x2-7x+5 = 1 = 20

⇒ 2x2 - 7x + 5 = 0

⇒ 2x2 - 2x - 5x + 5 = 0

 ⇒ (2x - 5)(x - 1) = 0

⇒ x = 5/2 or 1

Hence, option (b).

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