(x-3)² - (x-4)² = -(x-1)² + (x+2)²
x2 - 6x + 9 - x2 + 8x - 16 = -x2 +2x - 1 + x2 + 4x + 4
2x - 7 = 6x + 3 | - 2x - 3
-10 = 4x | : 4
x = - 10/4 = - 5/2
Probe:
(- 5/2 - 3)2 - (- 5/2 - 4)2 = 30,25 - 42,25 = - 12
- (- 5/2 - 1)2 + (- 5/2 + 2)2 = - 12,25 + 0,25 = - 12
Besten Gruß