fungsi T:R ----> R ditentukan oleh t(x)=px+q.jika t(5)=25 dan t(-1)=7. tentukan. a.p²+q² b.(p+q)² c.p³+q³ d.(p+q)³-3(pq)

t(x) = px + q

t(5) = 5p + q = 25
t(-1) = - p + q = 7
--------------------------(-)
6p = 18
p = 3
- p + q = 7
- 3 + q = 7
q = 7 + 3
q = 10

a) p² + q² = 3² + 10² = 9 + 100 = 109

b) (p + q)² = (3 + 10)³ = 13² = 169

c) p³ + q³ = 3³ + 10³ = 27 + 1000 = 1027

d) (p + q)³ - 3(pq)
= (3 + 10)³ - 3(3 × 10)
= 13³ - 3(30)
= 2197 - 90
= 2107