Answers

2014-08-03T22:00:28+08:00
(4a²-5a+6) - (2a²+3) - (9-6a)
= 2a²+a-6
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2014-08-03T22:04:19+08:00
(4a^2 - 5a + 6) - (2a^2 + 3) - (9 - 6a)

combine like terms
4a^2 - 2a^2 - 5a + 6a + 6 -3 -9
2a^2 + a - 6 <- Answer
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