Question

a and b are the roots of quadratic equation x² -7x +k =0 Find value of k, if a - b =11​

Answer 1

Step-by-step explanation:

given a-b=11

we know that coefficients of terms ie, sum of zeroes =-b/a

then

a+b=7

a-b=11

by solving a =9

b=-2

product of zeroes =c/a

then k/1=a×b

k=9×-2

k= -18