Question

class 10th math
solve these 3 questions ​

Answer 1

Step-by-step explanation:

q.7 = if -4 is the root of quadratic eqn. x2+px-4=0 and 2x2+px+k=0 then x= -4

put the value of x in both eqn.

16-4p-4=0 and 32-4p+k=0

now,subtract the eqn.1 and eqn.2

then

12-4p=0

32-4p+k=0

- + -

-20-k=0

k =-20