Question

If alpha and beta are the roots of the equation 2x^2+5x+k=0 where k is a constant and (alpha -2beta)=3. Find the values of:
a. Beta
b. K

Answer 1

Step-by-step explanation:

alpha=-b+root under(b^2-4ac)÷2a

alpha=-5+root under(5^2-4.2.k)÷2.2

beta=-5-root under(5^2-4.2.k)÷2.2

now (alpha -2beta)=3

we will put the value of alpha and beta from above

after solving

and we will get answers