Question

if alpha beta are the roots of x square + kx - 3 equal to zero and Alpha square + beta square equals to 10 then value of k is ​

Answer 1

Answer:

α^2+β^2=10

(α+β)^2-2αβ=10

(α+β)=-k

αβ=-3

k^2-2(-3)=10

k^2=10-6

k^2=4

k=2,-2