Răspunsuri

2014-04-23T23:43:50+03:00
X² -6x + 9 -(3x-2x² - 6 +4x) = 3 (x²-4) +1
x² -6x +9 -3x +2x² +6 -4x = 3x² - 12 +1
3x² -13 x +15 = 3x² -11
3x² -3x² -13 x = -15 - 11
-13x = -26
13x = 26
x = 26/13
x = 2
1 5 1