how do you factorise x^2-4 and 3x^2-12?

0 ⤊

am really stuck

2007-04-18 06:45:33 · 3 answers · asked by SCARLET 1 in Science & Mathematics ➔ Mathematics

(x-2)(x+2)

3(x^2-4)
3(x-2)(x+2)

2007-04-18 06:50:15 · answer #1 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋

xÂ² - 4 = (x - 2).(x + 2)
3xÂ² - 12 = 3.(xÂ² - 4) = 3.(x - 2).(x + 2)

2007-04-18 13:51:56 · answer #2 · answered by Como 7 · 0⤊ 0⤋

(x+2)(x-2) and 3(x+2)(x-2)

2007-04-18 13:54:06 · answer #3 · answered by dwinbaycity 5 · 0⤊ 0⤋