Math, asked by PrathameshSangar, 1 year ago

One of the roots of quadratic equation 2X square + kx-2=0 is -2 find k

Answers

Answered by mysticd
24
Hi ,

It is given that -2 is one root of quadratic

equation 2x² + kx -2 = 0

To find value of k , we have to substitute

x = -2 , in equation

2 × (-2)² + k ×( -2 ) - 2 = 0

8 - 2k -2 = 0

6 - 2k = 0

-2k = -6

k = ( -6 )/( -2 )

k = 3

I hope this helps you.
: )

k = -6/2

k = -3
Similar questions