collect like terms
3a+2a^2+a-a^2
You add like terms.
(3a+a)+(2a^2-a^2)= 4a+a^2
To collect like terms, you need to combine terms that have the same variable and exponent. Let's simplify the given expression step by step:
3a + 2a^2 + a - a^2
Step 1: Combine the "a" terms:
3a + a = 4a
Step 2: Combine the "a^2" terms:
2a^2 - a^2 = a^2
Now, we have simplified the expression to:
4a + a^2