Question

if both the roots of 4x^2+12x[k+3/4] are equal then k=............ .

Answer 1

hey mate!

here D =0

12 (k+3/4)=0

k+3/4=0

K = -3/4

hope it helps!

#Phoenix

Answer 2

HEY MATE!

HERE IS YOUR ANSWER:

If one root of the polynomial is x then other will be also x

In equation 4x^2+12x[k+3/4]
4x^2+12kx+12×3/4
4x^2+12kx+9=0

a=4 ;b=12kx; c=9

sum of zeroes(x+x)= -b/a
so,2x=-12kx/4
2x=-3kx
2x+3kx=0
x(2+3k)=0
2+3k=0
3k=-2
k=-2/3
____________________☆

HOPE IT HELPED ^_^