Question 631478
{{{(5a^3+3a-2)-(4a^3+a^2+5)}}} Start with the given expression.



{{{5a^3+3a-2-4a^3-a^2-5}}} Distribute



{{{(5a^3-4a^3)+(-a^2)+(3a)+(-2-5)}}} Group like terms



{{{a^3-a^2+3a-7}}} Combine like terms



So the answer is {{{a^3-a^2+3a-7}}}, which is <font color="red">choice B</font>


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