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(x - 3)(x - 1) = 0
x - 3 = 0
x1 = 3
x - 1 = 0
x2 = 1
x1 - x2 = 3 - 1 = 2
2. x² - 3x + 8
a = 1
b = -3
c = 8
x1 + x2 = -b/a
= -(-3) / 1
= 3/1
= 3
x1 . x2 = c/a
= 8/1
= 8
nilai
(x1 + x2)^2 - 2x1x2
= 3^2 - 2 . 8
= 9 - 16
= -7
X-3 = 0 ATAU X-1 = 0
X1 = 3 X2 = 1
jadi, hasil x1-x2 = 3-1 = 2