Herbert
X
2 - x + 2
= x
2 - 2x + x + 2
= x (x
- 2) + (x - 2)
= (x
- 2) (x + 1)
Los factores de x
2 - x + 2
son (x
- 2) y (x + 1)
9 - 4xy - y
2 - x
2
x = {-b
+ √ (b
2 - 4ac)} / 2a
x = {-4y
+ √ (16y
2 - 4 (1) ( y
2 - 9)} / 2 (1)
x = {-4y
+ √ (12y
2 + 36)} / 2
x = {-4y
+ √12 (y
2 + 3)} / 2
x = {-4y
+ √2 * 2 * 3 (y
2 + 3)} / 2
x = {-4y
+ 2√3 (y
2 + 3)} / 2
x = 2 {-2y
+ √3 (y
2 + 3)} / 2
x = -2y
+ √3 (y
2 + 3)
Los factores de 9 - 4xy - y
2 - x
2 son {-2y + √3 (y
2 + 3)} y {-2y - √3 (y
2 + 3)}