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Mathematics

Solve the following equation by factorization:

3x22\sqrt{3x^2 - 2} = (2x - 1)

Quadratic Equations

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Answer

Given,

3x22\sqrt{3x^2 - 2} = (2x - 1)

Squaring both sides we get :

⇒ (3x2 - 2) = (2x - 1)2

⇒ 3x2 - 2 = (2x)2 + (1)2 - 2 × 2x × 1

⇒ 3x2 - 2 = 4x2 + 1 - 4x

⇒ 4x2 + 1 - 4x - 3x2 + 2 = 0

⇒ x2 - 4x + 3 = 0

⇒ x2 - x - 3x + 3 = 0

⇒ x(x - 1) - 3(x - 1) = 0

⇒ (x - 1)(x - 3) = 0

⇒ (x - 1) = 0 or (x - 3) = 0      [Using Zero-product rule]

⇒ x = 1 or x = 3.

Hence, x = {1, 3}.

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