October 2021 2 15 Report
После приведения подобных слагаемых

6,2b+z+z−44,7b получаем


(выбери правильный ответ):

1) −38,5b2+z2

2) −38,5b+2z

3) другой ответ

4) −38,5b2+2z2

5) −38,5b+z2
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