ini mana yg betul, (1). 3x2+3x-6 = (3x-3) (x+2) (2). 4x2-6x = 2x(2x-3) (3). 4x2-2x-12 = (2x-4) (2x-3) (4). x2+3x-10 = (x+5) (x-2)

Yang betul: (1), (2), dan (4). Kita buktikan:

(1) [tex]3x^2[/tex] + 3x - 6 = (3x - 3)(x + 2)
[tex]3x^2[/tex] + 3x - 6 = [tex]3x^2[/tex] + 6x - 3x - 6
[tex]3x^2[/tex] + 3x - 6 = [tex]3x^2[/tex] + 3x - 6 (Benar)

(2) [tex]4x^2[/tex] - 6x = 2x(2x - 3)
[tex]4x^2[/tex] - 6x = [tex]4x^2[/tex] - 6x (Benar)

(3) [tex]4x^2[/tex] - 2x - 12 = (2x - 4)(2x - 3)
[tex]4x^2[/tex] - 2x - 12 = [tex]4x^2[/tex] - 6x - 8x + 12
[tex]4x^2[/tex] - 2x - 12 = [tex]4x^2[/tex] - 14x + 12 (Salah)

(4) [tex]x^2[/tex] + 3x - 10 = (x + 5)(x - 2)
[tex]x^2[/tex] + 3x - 10 = [tex]x^2[/tex] - 2x + 5x - 10
[tex]x^2[/tex] + 3x - 10 = [tex]x^2[/tex] + 3x - 10 (Benar)

1. 3x^2 + 3x - 6 = 3x^2 + 3x -6    (betul)
2. 4x^2 - 6x = 4x^2 - 6x      (betul)
3. 4x^2 - 2x - 12 = 4x^2 -14x + 12  (salah)
4. x^2 + 3x - 10 = x^2 + 3x - 10    (betul)