Zapisz w jak najprostszej postaci wyrażenie
(2a+3)²-(a+2)(2a-2)
Ma wyjść 2akwadrat+10a+13
(2a+3)²-(a+2)(2a-2)=4a²+12a+9-2a²-2a+4=2a²+10a+13
4a^{2}+12a+9-(2a^{2}-2a+4a-4)= 4a^{2}+12a+9-2a^{2}+2a-4a+4= 2a^{2}+10a+13
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(2a+3)²-(a+2)(2a-2)=4a²+12a+9-2a²-2a+4=2a²+10a+13
4a^{2}+12a+9-(2a^{2}-2a+4a-4)= 4a^{2}+12a+9-2a^{2}+2a-4a+4= 2a^{2}+10a+13