Zapisz w postaci jak najprostszej sumy algebaricznej
2(2x+3)(x-1)
1-(z+5)(2k+4)
-3(a+2b)(a-b)+3akwadrat
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1. 2(2x+3)(x-1) = 2(2x^2+3x-2x-3)= 4x^2+6x-4x-6= 4x^2+2x-6
2. 1-(z+5)(2k+4)= 1-(2kz+10k+4z+20)= 1-2kz-10-4z-20
3. -3(a+2b)(a-b)+3a^2= -3(a^2+2ab-ab-2b^2)+3a^2= -3a^2-6ab+3ab+6b^2+3a^2=-3ab+6b^2
* (^2) = do potęgi drugiej