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x1+x2 = -b/a
= -(-6)/2 = 3
x1.x2 = c/a
= -p/2
x1-x2 = 5
jika :
sehingga
x1 + x2 =
=
x1 + x2 = 3
x1 - x2 = 5
------------------ +
2.x1 = 8
x1 = 8 : 2
x1 = 4
x1 + x2 = 3
4 + x2 = 3
x2 = 3 - 4
x2 = - 1
x1 . x2 =
4 . - 1 =
- 4 =
p = - 4 . -2
p = 8