Zapisz w jak najprostrzej postaci : 2x(x-5)-3(x do potegi 2-2x)+(x-2)x a(a+b+c)-b(a-b+c)-c(a-b-c) prosze o szybka odpowiedz :))
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2x^2 - 10x -3x^2+6x+x^2-2x= - 6x
a^2 +ab+ac - ab + b^2 - bc - ac+bc+c^2=a^2 + b^2+c^2
2x*(x-5)-3(x2-2x)+(x-2)*x=2x2-10x-3x2+6x+x2-2x=-6x
a(a+b+c)-b(a-b+c)-c(a-b-c)=a2+ab+ac-ab+b2-bc-ac+bc+c2=a2+b2+c2