Ответ:
(а+5)^2-(а^2+25)=[tex]a^{2}[/tex]+10a+25-[tex]a^{2}[/tex]-25=10a+25-25=10a
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Ответ:
(а+5)^2-(а^2+25)=[tex]a^{2}[/tex]+10a+25-[tex]a^{2}[/tex]-25=10a+25-25=10a