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The value of x satisfying the equation 4x - 5(2x) + 4 = 0 are1. 0 and 22. 0 and -23. 2 and -24. None of the above |
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Answer» Correct Answer - Option 1 : 0 and 2 Given ; 4x - 5(2x) + 4 = 0 Calculation (2x)2 - 5(2x) + 4 = 0 Let, 2x = y ⇒ y2 - 5y + 4 = 0 ⇒ (y - 1) (y - 4) = 0 ⇒ y = 1, 4 ⇒ 2x = 1 and 2x = 4 ⇒ 2x = 20 and 2x = 22 ∴ The required answer is x = 0, x = 2 |
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