tentukan nilai a dan hasil bagi pada p(x)=5xpangkat4 + 3xpangkat3 +xpangkat2 +ax - 8 dibagi (x+2) sisa =42

x + 2 = 0
x = -2

p(x) = 5x⁴ + 3x³ + x² + ax - 8

p(-2) = 42
5(-2)⁴ + 3(-2)³ + (-2)² + a(-2) - 8 = 42
5.16 - 3.8 + 4 - 2a - 8 - 42 = 0
80 - 24 + 4 - 2a - 50 = 0
10 - 2a = 0
2a = 10
a = 10/2
a = 5 ✓

p(x) : (x + 2)

.....5.......3........1.......5.......-8
-2
.............-10......14.....-30...50__(+)
......5.....-7.......15.....-25....42

Hasil bagi
= (5x³ - 7x² + 15x - 25)/5
= x³ - 7/5 x² + 3x - 5

Sisa bagi = 42