Question

what is the value of K if -4 is one of the root of following equation: n^2+kn=0

Answer 1

Step-by-step explanation:

substituting 4 in it gives 16 - 4k = 0

16 = 4k

4 = k

Answer 2

Given :-

n^2 +kn = 0 》 equation.1

one root is "-4"

To Find :-

k = ?

Solution :-

》Given one root is "-4" substitue in equation.1

then we get 》

(-4)^2 + k (-4) = 0

16-4k = 0

4k = 16

k = 16/4

k = 4

》 Therefore "k" value is "4".

Checking :-

》 "k" value substitue in equation.1 and find the roots.

n^2+(4)n = 0

n^2+4n = 0

n(n+4) = 0

n+4 = 0

n = -4

》 So we got correct answer of "k" value.