Doprowadź d najprostszej postaci wyrażenie: (2a-1)kwadrat-(3a-2)(3a+2)-2(a-1)
(2a-1)^2-(3a-2)(3a+2)-2(a-1) =
4a^2-4a+1-(9a^2+6a-6a-4)-2a+2=
4a^2-4a+1-9a^2+4-2a+2=
-5a^2-6a+7
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(2a-1)^2-(3a-2)(3a+2)-2(a-1) =
4a^2-4a+1-(9a^2+6a-6a-4)-2a+2=
4a^2-4a+1-9a^2+4-2a+2=
-5a^2-6a+7