October 2018 1 9 Report

Uprość wyrażenia : -(2x^{2}+xy-2x)-(-3x^{2}+2xy)-x=

(-5x^{2}+3x)-(2x-x^{2})=

2(a+b)+(-4a-2b)=

3(x+y-a)-5(2y-x+a)=

9x-15/3 + 8x-4/-2=

20x^{2} -4x+1/4= -2 pierwiastka z 3 (a+pierwiastek z 3x)


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