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Verified answer
Jawab4x^2 - 6x + 5= 0
p+q = 6/4 = 3/2
pq = 5/4
1/p^2 + 1/q^2 = (p+q)^2 - 2 pq / (pq)^2
= (3/2)^2 - 2(5/4) / (5/4)^2
= (9/4 - 10/4) x (16/25)
= - 1/4 x 16/25
= - 4/25