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+ = 810
+ = 810 .....bagi dengan
+ = 30
2 . = 30
= 30 : 2
= 15
tidak ada solusi
=
=
=
- 2x² + x = - x - 3
- 2x² + 2x + 3 = 0 ------> a = - 2 ; b = 2 ;c = 3
(x1 + x2)² = (- b/a)²
= b²/a²
= 2² /(-2)²
= 4/4
= 1 tidak ada solust ....