Question

If one root of the equation 2X square +kx+4=0 is 2 then other root is what

Answer 1

Answer:

k = -6 and root = 1

Step-by-step explanation:

let another root be A.

Then,

2 + A = -k/2(I)

and 2.A = 4/2...(II)

from II we have  A = 1

and substituting it in (I)

we get k = -6.

Answer 2

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Step-by-step explanation:

given,

2x^2+kx+4=0

and one of the root = 2

another root = ?

2x^2+kx+4=0

2x(x-2)-2(x-2)=0

(2x-2)(x-2)=0

2x= 2 x=2

x = 1

therefore another root=1