Caleb C. answered • 05/29/14
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Math and Science Tutor
First, you would have to change the signs on both the 4 and the 2a^2 from positive to negative since they are both in parentheses and are both being subtracted. Then subtract the LIKE TERMS. Only 3a^2 and 2a^2 can be added/subtracted since they are like terms, and only the numbers 1 and 4 can be added and subtracted since they are like terms.
The 3a^2 - 2a^2 will give you 1a^2 (or just a^2).
The 1 - 4 will give you -3.
Your final answer will be a^2-3.
