a) 2x ( x-5) -3 ( x 2 -2x ) + ( x-2) x = b) a ( a +b+c ) -b ( a-b+c ) -c ( a-b-c) = c) x ( x2 +2x + 1 ) - ( -4x3 + 8x2 - 6) : 2 = x2 = x to kwadratu -4x3 = -4x do szcześcianu 8x2 = 8x do kwadratu

a) 2x ( x-5) -3 ( x 2 -2x ) + ( x-2) x = 2X^2 - 10X - 3X^2 + 6X + X^2 - 2X= -6x b) a ( a +b+c ) -b ( a-b+c ) -c ( a-b-c) = a^2 +ab + ac - ab + b^2 - bc - ac +bc + c^2 = a^2 + b^2 + c^2 c) x ( x2 +2x + 1 ) - ( -4x3 + 8x2 - 6) : 2 = x^3 + 2x^2 + x + 2x^3 - 4x^2 + 3 = 3x^3 - 2x^2 + x + 3 x^2 = x do kwadratu x^3 = x do szcześcianu pozdrawiam :)