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x² - x - 6 = -x² - 2x - 6
2x² + x = 0
x (2x+1) = 0
x = 0 v 2x + 1 = 0
2x = -1
x = -0,5
Spr:
x = 0
(0-3)(0+2) = (0+4)(2-0)-14
-3*2 =4*2 - 14
-6=8-14
-6 = -6
L = P
x = -0,5
(-0,5-3)(-0,5+2) = (-0,5+4)(2-(-0,5))-14
-3,5*1,5 = 3,5*2,5-14
-5,25 =8,75-14
-5,25=-5,25
L = P
2. 4 - 12x + 9x² +3x - 3 + x² - x = 1+x
10x² - 10x +1 = 1+x
10x² - 11x = 0
x(10x -11) = 0
x = 0 v 10x -11 = 0
10x= 11
x = 1,1
Spr:
x= 0
(2-3*0)² + (3+0)(0-1)= 1+0
2² + (-1)*3 = 1
4-3 = 1
1 = 1
L=P
x = 1,1
(2-3*1,1)² + (3+1,1)(1,1-1) = 1+1,1
(2-3,3)²+4,1*0,1=2,1
1,69+0,41=2,1
2,1=2,1
L=P