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x^2 - 3x - 4 = 2x + 2
x^2 -5x - 6=0
(x-6)(x+1)
x= 6 v x=-1
=
=
x² - 3x - 4 = 2x + 2
x² - 3x - 2x - 4 - 2 = 0
x² - 5x - 6 = 0
(x - 6) (x + 1) = 0
x - 6 = 0 atau x + 1 = 0
x = 6 atau x = - 1
2) =
=
=
=
=
3x + 9 = 2x - 1
3x - 2x = - 1 - 9
x = - 10
3) =
=
=
=
- 12 + 3x = .x + 3 ---> kedua ruas kalikan dgn 2
- 24 + 6x = x + 6
6x - x = 6 + 24
5x = 30
x =
x = 6
4) =
x + 3 = 0
x = - 3
5) =
2x² - x - 3 = 0
(2x - 3) (x + 1) = 0
2x - 3 = 0 atau x + 1 = 0
2x = 3 atau x = - 1
x =
x = 1