Question

(1) If the roots of quadratic equation 2x?+ 6x +k=0 are real and
equal then find the value of k​

Answer 1

Answer:

2x+6x+k

a=2,b=6and c=k

when the roots are real and equal

${b}^{2} - 4ac = 0$

${6}^{2} - 4 \times 2 \times k = 0$

36-8k=0

8k=36

k=36/8

k=9/2