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x^2 - 8x + 16
p = -4, q = -4
(x-4)(x-4)
(x-4)^2
b.
6x^2 - 28x + 30
Kalikan 30 dengan 6,
p+q = -28
pq = 180
p = -10, q = -18
1/6 (6x-10)(6x-18)
1/6(6x-10)6(x-3)
(6x-10)(x-3)
2(3x-5)(x-3)