rozwiąż równanie i nierówność: a) (x+2)^2 + (x-2)^2 = (2x-4)^2 -2x^2 b) 3x-7/2 + x < 2(x-1)
a) 2x+4+2x-4=4x-8-4x
4x=-8/:4
x=-2
b) 3x-3 1/2+x<2x-2
4x-3 1/2<2x-2/-2x + 3 1/2
2x<1 1/2 /:2
x<3/4
a) (x+2)*2+(x-2)*2=(2x-4)*2-2x-2=2x+4+2x-4=4x-8-4x=4x=4x-16
b) 3x-7/2+x*2(x-1)=3x-3.5+x+2x-2=6x-5,5
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a) 2x+4+2x-4=4x-8-4x
4x=-8/:4
x=-2
b) 3x-3 1/2+x<2x-2
4x-3 1/2<2x-2/-2x + 3 1/2
2x<1 1/2 /:2
x<3/4
a) (x+2)*2+(x-2)*2=(2x-4)*2-2x-2=2x+4+2x-4=4x-8-4x=4x=4x-16
b) 3x-7/2+x*2(x-1)=3x-3.5+x+2x-2=6x-5,5