Nilai p agar x^2 + 2px +25 =0 memiliki akar kembar adalah….

• PK

x² + 2px + 25 = 0

Agar akar – akar kembar , haruslah D = 0

D = 0

b² – 4ac = 0

4p² – 4(1)(25) = 0

4p² = 100

p² = 25

p = ± 5