Question

One of the root of equation  x²+mx-5 = 0 is  2  ;  find m

 a)-2

 b)-1/2

 c)1/2

 d)2

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Answer 1

put x= 2

2^2+m×2-5=0

4+2m-5=0

-1+2m=0

2m=1

m=1/2

Ans. 1/2

Answer 2

Answer:

Given that,

x=2(2 is a root of the equation)

putting value of x in equation,

x^2+mx-=0

therefore ,4+2m-5=0

therefore,m=1/2