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Question

Find the discriminant for the given quadratic equation: x2+4x+k=0

A
64k
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B
164k
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C
163k
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D
132k
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Solution

The correct option is A 164k
Given equation is,
x2+4x+k=0
We know,
D=b24ac
a=1,b=4,c=k
D=(4)24(1)(k)
D=164k

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