rozwiąż równania i nierówności:
a) (x-2)(x+3)=(x+4)(x-5)
b) (x-1)2<(x+2)2
x^2+3x-2x-6=x^2-5x+4x+20 /-x^2
3x-2x-6=-5x+4x+20 /+6
-x = 9x+26 /-9x
-10x=26 //-10
x=-2,6
2x-2 <2x+4 /-2x
-2 < 4
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a) (x-2)(x+3)=(x+4)(x-5)
x^2+3x-2x-6=x^2-5x+4x+20 /-x^2
3x-2x-6=-5x+4x+20 /+6
-x = 9x+26 /-9x
-10x=26 //-10
x=-2,6
b) (x-1)2<(x+2)2
2x-2 <2x+4 /-2x
-2 < 4