Question

WORK SHEET - 4
For what value of k is one root of the
quadratic equation 9-18x+k=0 double
the other?
(a) 36 (b) 9 (c) 12 (d) 8​

Answer 1

Answer:

c.. ....... . . . . . . . . .

Answer 2

Answer:

(d) 8

Step-by-step explanation:

one root is n then another root is 2n.

therefore

n+2n=18/9

3n=2

n=2/3

Again

n.2n=k/9

2n२=k/9

2×(2/3)२=k/9

2×4/9=k/9

8=k

Hence the value of K is 8.