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Since
4 is the root of the given quadratic equation.
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∴
It satisfies the given equation
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∴
We can put x = 4 in the given quadratic equation
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x2
– 7x + k =0 [Given}
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∴
42 – 7(4) + k = 0
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∴
16 – 28 + k = 0
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∴
- 12 + k = 0
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k
= 12
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Answer:
The value of k is 12
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If one root of the quadratic equation x2 – 7x + k = 0 is 4, then find the value of k.
