Question

if -3 is root of quadratic equation x²+ mx- 3=0 and x²+mx+n=0 is equal root then find the value of n

Answer 1

p(-3)=-3^2-3m-3=0
9-3m-3=0
3m=6
M=3
9+-3×2+n=0
9-6+n=0
n=-3