| x+y | x−y | |||
a) | = x,y>0 b) | = | ||
| √x4+2x3y+x2y2 | 3√x−3√y |
| x + y | x + y | |||
a) | = | = | ||
| √x4 + 2x3 + x2y2 | √x2(x2 + 2xy + y2) |
| x+y | x + y | |||
= | = | = | ||
| √x2 * (x+y)2 | √x2 * √(x+y)2 |
| x + y | x + y | 1 | ||||
= | = | = | ||||
| |x| * |x+y| | x * (x+y) | x |
| x − y | (3√x)3 − (3√y)3 | |||
b) | = | = | ||
| 3√x − 3√y | 3√x − 3√y |
| (3√x − 3√y)(3√x2 + 3√xy + 3√y2) | ||
= | = | |
| 3√x − 3√y |