| 7 | 2x+3 | |||
Rozwiąż równanie | + | =0 | ||
| 4x+1 | 5−8x |
| 1 | 2 | |||
Dziedzina: x∊R{− | , 1 | } | ||
| 4 | 3 |
| 7 | 2x+3 | ||
+ | =0 | ||
| 4x+1 | 5−8x |
| 7(5−3x) | (2x+3)(4x+1) | ||
+ | =0 | ||
| (4x+1)(5−3x) | (5−3x)(4x+1) |
| 35−21x+8x2+2x+12x+3 | |
=0 | |
| 20x−12x2+5−3x |
| 38−7x+8x2 | |
=0 | |
| 17x−12x2+5 |
5 − 8 x = 0
8 x = 5
x = 58
D = R \ { − 14 , 58 }
| 7 | 2x + 3 | ||
+ | = 0 | ||
| 4x + 1 | 5 − 8 x |
| 7 | − 2x − 3 | ||
= | ; mnożymy na krzyż | ||
| 4x + 1 | 5 − 8 x |