How do you combine $(a + 3a^2 + 2a^3) - (a^4 - a^3)$ ?

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Answer 1 · 2015-05-18T11:52:29

$(a + 3a^2 +2a^3) - (a^4 - a^3)$

$=a + 3a^2 +2a^3 - a^4 +a^3$

We group the Like Terms

$= (2a^3+a^3) - a^4 + a + 3a^2$
$= 3a^3 - a^4 + a + 3a^2$
$= color(green)( - a^4 +3a^3+ 3a^2+a$

How do you combine (a + 3a^2 + 2a^3) - (a^4 - a^3)(a + 3a^2 + 2a^3) - (a^4 - a^3)?