Question

Find the value of p so that quadratic equation px(x-3)+9=0 has two equal roots ?

Answer 1

discriminate will become 0 while roots r equal

Answer 2

px(x-3)+9=0
=)px^-3px+9=0
b^-4ac=0
=)(-3p)^-4p9=0
=)9p^-36=0
=)9p^=36
=)p^=4
=)p=2