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=> x1 + x2 = -b/a = 6p/p = 6
=> x1 = 2.x2
2.x2 + x2 = 6
3.x2 = 6
x2 = 6/3 = 2
x1 = 2.x2 = 2.2 = 4
=>p(2)²-6p(2)+8 = 0
4p - 12p = -8
-8p = -8
p = 1
a = p
b = -6p
c = 8
x = 2y
x + y = -b/a = -(-6p)/p = 6p/p = 6
x . y = c/a = 8/p
x + y = 6 maka 2y+y = 6
3y = 6
y = 6/3 = 2
x+2 = 6
x = 6-2
= 4
x.y = 8/p
4.2 = 8/p
8 = 8/p
p = 8/8 =1