One root of the quadratic equation
x2 - 7x - 2k = 0 is 4
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Step-by-step explanation:
x^2 - 7x - 2k = 0
since the root given is 4,
substituting x by 4 in the given equation:
=> (4)^2 - 7(4) - 2k = 0
=> 16 - 28 - 2k = 0
=> 12 - 2k = 0
=> 12 = 2k
=> k = 6
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