সমাধান করুন: 12(x² + 1) = 25x

A 4/3

B 3/4

C 4

D ক ও খ উভয়ই

Solution

Correct Answer: Option D

12(x² + 1) = 25x
⇒ 12x² + 12 = 25x
⇒ 12x² - 25x + 12 = 0
⇒ 12x² - 16x - 9x + 12 = 0
⇒ 4x(3x - 4) - 3(3x - 4) = 0
⇒ (3x - 4)(4x - 3) = 0

∴ 3x - 4 = 0   অথবা 4x - 3 = 0
⇒ 3x = 4             ⇒ 4x = 3
⇒ x = ⁴⁄₃             ⇒ x = ¾

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