Wykonaj działananie na wyrażeniach algebraicznych i uprość
-2( 3x-5) + 0.5 (4-6x) =
(x-3)(x+3) - 0.5 (x+2) ^2 (do kwadratu =
(3x-2) (4+x)-2(x+1)(x-1)=
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-2( 3x-5) + 0.5 (4-6x) = -6x+10 + 2-3x = -9x +12
(x-3)(x+3) - 0.5 (x+2) ^2 = x^2-3x-9 - 0,5(x^2+4) = x^2-3x-9 -0,5x^2-2 =0,5x^2 -3x-11
(3x-2) (4+x)-2(x+1)(x-1) = 12x+3x^2-8-2x - 2x-2(x-1) = 12x+3x^2-8-2x - 2x-2x+2 = 6x +3x^2-6