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a^{4}-16
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a^{4}-16
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\left(a^{3}+2a^{2}+4a+8\right)\left(a-2\right)
Use the distributive property to multiply a^{2}+4 by a+2.
a^{4}-16
Use the distributive property to multiply a^{3}+2a^{2}+4a+8 by a-2 and combine like terms.
\left(a^{3}+2a^{2}+4a+8\right)\left(a-2\right)
Use the distributive property to multiply a^{2}+4 by a+2.
a^{4}-16
Use the distributive property to multiply a^{3}+2a^{2}+4a+8 by a-2 and combine like terms.
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