Mathematics · Quadratic Equations

If the quadratic equations mx 2 - 2x + 4 = 0 and x 2 - 4x + n = 0 have a common root 3, then the value of n - m is:

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112 5
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417 9

Correct answer

25 9

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If the quadratic equations mx 2 - 2x + 4 = 0 and x 2 - 4x + n = 0 have a common root 3, then the value of n - m is:

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If the quadratic equations mx 2 - 2x + 4 = 0 and x 2 - 4x + n = 0 have a common root 3, then the value of n - m is:

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