Question

For what values of p,the equation 9x²+6px+4=0 has equal roots?​

Answer 1

Answer:

Equal roots mean D=0

D= b²-4ac => 6p²-4(9)(4)=0

D= 36p²-144=0

36(p²-4)=0

(p²-4)=0/36

(p²-4)=0

p²=4

p=2