10a * (a + 2)
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Factor completely and check mentally 10a^2+20a
It cannot be simplified any further, so it is: 5a³ + 15a² + 20a
20a plus 14 will be 34a minus 8a minus 7 34a minus 8 is 26a minus 7 is 19a. The single b is 1b plus 6b which is 7b minus 2b equals 5b.
12
They are 4 terms of an algebraic expression.