Question

solve the this question

do both questions​

Answer 1

Answer:

for 1st question use cbse guide

answer 2)

let a and b be the zeros of the given polynomial

sum of zeros a+b=3k

and the product of zeros ab=2k²-1=7. (given)

2k²=7+1

2k²=8

k²=4

k=±2

I hope this answer May help you

Answer 2

Step-by-step explanation:

1. a³b² is the LCM. please refer to attached photo for derivation

2. in a quadratic eqn product of zero is the coeffocient of term with x⁰.

so 2k²-1 =7

k²= 4

k= +/- 2