September 2018 1 123 Report

Rozwiąż:

1.

|x+3|<3

|x-2|<4

|x+3/2|<2

|x-4|<1/2

2.

\left \{ {{4x +2y=10} \atop {6x+3y=15}} \right

\left \{ {{-3x+2y=9} \atop {-4x+3y=-29}} \right

\left \{ {{-3x+y=2} \atop {2x-8y=6}} \right

\left \{ {{2x+y=5} \atop {x-y=4}} \right

3.

x(x+3)-49=x(x-4)

 (2x-3) ^{2} = 8x

(x+3)^{2}= (x+4)^{2} + 3x

(x-3)^{2} + (x-2)^{2} - (x-1)^{2} = 0

3(x-1)(x-5)\leq 0


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