Mathematics, 21.04.2020 00:33, girly37

Which shows equivalent expressions?
a +36-2a? - 3a +36-4a?
a +36-2a? - 3a²+4b-4a?
-a?+ 3b-2a² - 3a + 3b
-a?+ 3b+ 2a? - 3a? +4b-2a?

Answers: 3

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Do you know the correct answer?

Which shows equivalent expressions?
a +36-2a? - 3a +36-4a?
a +36-2a? - 3a²+4b-4a?
...