# Find the value of k for which x = 1 is a root of the equation x2 + kx + 3 = 0. Also, find the other root.

Given x = 1 is a root of the equation x2 + kx + 3 = 0 it means it satisfies the equation.

Substituting x = 1 in equation -

12 + k(1) + 3 = 0  Putting the value of k in the given equation : x2 + kx + 3 = 0

This reduced to the quadratic equation x2 - 4x + 3 = 0

Using the splitting middle term - the middle term of the general equation is divided in two such values that:

Product = a.c

For the given equation = 1.3

= 3

And either of their sum or difference = b

= - 4

Thus the two terms are - 1 and - 3

Sum = - 1 - 3 = - 4

Product = - 1. - 3 = 3  x(x-1)-3(x-1) = 0

(x-1)(x-3) = 0

x = 1 or x = 3

Thus other root is 3.

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