if one root of the quadratic equation x^2-7x+k=0 is 4 then find the value of k
Answers
Answered by
1
Answer:
Correct option is
A
12
Since, 4 is root of x
2
−7x+k=0
⇒4
2
−7×4+k=0
⇒16−28+k=0
⇒k=12
Answered by
1
Answer:
k=12
Step-by-step explanation:
x²-7x+k=0
x=4(root)
applying x in the equation,
4²-7×4+k=0
16-28+k=0
-12+k=0
k=12
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