Question

VILE VIC LUITEL answer ----
If x=-3 is one root of x2-kx+6=0 then value of k is
a. 2
b. -5
c. 3
d. -1​

Answer 1

Answer:

Value of k = -5

Step-by-step explanation:

If x = -3 is one root of x²-kx+6=0,

then value of k is

(-3)²-k(-3)+6=0

=> 9+3k+6 = 0

=> 15+3k = 0

=> 3k = -15

/* divide each term by 3, we get

=> k = -5

Therefore,

Value of k = -5

•••♪

Answer 2

$\huge{\mathfrak{\underline{\underline{\pink{AnSwEr:-}}}}}$

k = -5

$\huge{\mathfrak{\underline{\underline{\blue{Explanation:-}}}}}$

We are given that x = -3

Substitute value of x in the equation.

x² - kx + 6 = 0

(-3)² - k(-3) + 6 = 0

15 - (-3)k = 0

15 + 3k = 0

+3k = -15

3k = -15

k = - 15/3

$\huge{\sf{k \: = \: -5}}$