# How do you ddd: 3 a <mrow class="MJX-TeXAtom-ORD"> 2 </mrow> </msup> +

How do you ddd: $3{a}^{2}+8a-6$ and $4{a}^{2}-9a+11$?
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Caiden Barrett
You must add together terms that have the same kind of variables (such as ${a}^{3}$)
according to their numerical values (with sign):
for example:
You can add: $5{a}^{3}+2{a}^{3}=7{a}^{3}$ the variables are of the same kind ${a}^{3}$ so you simply add the mumerical values;
You cannot add: $5{a}^{3}+3{a}^{2}$ the variables are different!!!!
You add together, according to their sign, single numbers (without variables).
If you add correctly, you should get $3{a}^{3}+4{a}^{2}-a+5$.