Odpowiedzi

2009-11-14T19:00:11+01:00
Zad.1
8x/2x-1 - 6x/2x+1 -1=4x-1-3x+1=x; x≠0
x³-8/x³+8 * 4x+8/4x-8=x³-8/x³+32x+2/x-8/× x³
x⁶-8+32x⁴+2x²-8=2x²+32x⁴+x⁶-16; x≠0
4x²-9/2x²-3x / 15+10x/3x²=4x²-4,5x²-0,2x+3 1/(3x)=-0,5x²+3 6/15x; x≠0

Zad.3
2x-⅓x-7=0
2x-⅓x=7
1⅔x=7
x=4,2

3x+4/x+2=x+3/x+5 /x
3x²+4+2x=x²+3+5
3x²+2x-x²=8-4
2x²+2x=4 /2
x²+x=2
x²=2-x
x=√(2-x)