Rozwiąż równanie:
a) 2x-3
--------=5
3x+1
b) 4-x 2
------=-----
x-2 3
c) x-1 2x-2
----------=--------
x+2 x+1
d) x+1 2
-------=------
2x-1 x
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a)
2x-3=5*(3x+1)
2x-3=15x+5
-8=17x
x=-8/17
b)
(4-x)*3=(x-2)*2
12-3x=2x-4
16=5x
x=5/16
c)
(x-1)*(x+1)=(x+2)*(2x-2)
x^2+1=2x^2+2x-4
-x^2-2x+5-0
=4+20=24=(4*6)
=2
x1=
x2=
d)
(x+1)*x=(2x-1)*2
x^2+x=4x-2
x^2-3x+2=0
=9-8=1
=1
x1=
x2=
Jeśli cos nie zgadzałoby się to pisz.