No 10 tolong yahhh..

10.  persamaan kuadrat
x² - 3x - 4 = 0
(x - 4)( x + 1) = 0
x = 4 atau x = -1
misal
x₁ = 4  dan x₂  = - 1

p = x₁/x₂  - 1 = (4/-1) - 1 = - 4 - 1 = -5
q = x₂/x₁ - 1 = (-1/4) - 1 = -1/4 - 1 = - 5/4
PK baru = x² -(p+q) x + (p q)= 0
p+q = -5 - 5/4 = -25/4
p q = -5(-5/4) = 25/4

Pk baru  x² -(25/4)x + (25/4)= 0 ....kalikan 4
4x² - 25x + 25= 0