Find the value of k for which k x² + 5x – 3 = 0 has x = -3 as its root (a) 1 (b) 2 (c) 4 (d) 6 Question Find the value of k for which k x² + 5x – 3 = 0 has x = -3 as its root (a) 1 (b) 2 (c) 4 (d) 6 in progress 0 Math Ayla 4 months 2021-09-24T14:32:25+00:00 2021-09-24T14:32:25+00:00 2 Answers 0 views 0

## Answers ( )

Answer:6

Step-by-step explanation:K+5x-3=0k(-3)+5(-3)-3=0

-3k-15-3=0

-3k=18

k=18by3

k=6

Answer:2

Step-by-step explanation:p(x) = kx² + 5x – 3

As x = -3 as root , substituting x in p(x) ,

p(-3) = k(-3)² + 5(-3) – 3 = 0

= 9k – 15 – 3 = 0

=> 9k – 18 = 0

=> 9k = 18

=> k = 2