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(p+2) + (q + 2) = p + q + 4
= -b/a + 4
= -(-1)/1 + 4= 1/1 + 4= 5
(p+2)(q+2) = pq + 2(p+q) + 4
=c/a + 2(-b/a) + 4
= 2 + 2 + 4
= 8
Pers. Kuadrat baru x² - {(p+2) + (q+2)}x + (p+2)(q+2) = 0
x² - 5x + 8 = 0