Zapisz w jak najprostszej postaci
a)2x(x-5)-3(xdo kwadratu-2x)+(x-2)x
b)a(a+b+c)-b(a-b+c)-c(a-b-c)
c)x(xdo kwadratu+2x+1)-(-4x do potegi trzeciej +8x do kwadratu-6):2
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a)2x^2-10-3x^2-2x+x-2x=5x^2+x-10
b)2a+ab+ac-ba+bb+bc-ca+cb+cc=2ac+2ab+2ac+bb+2a+2cb
c)x^2+2x+1-(-4x)^3+8x^2-6/2=5^2+2x-5/2