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64-a^{2}
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64-a^{2}
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a\left(-a\right)-8a-8\left(-a\right)+64
Apply the distributive property by multiplying each term of a-8 by each term of -a-8.
a\left(-a\right)-8a+8a+64
Multiply -8 and -1 to get 8.
a\left(-a\right)+64
Combine -8a and 8a to get 0.
a^{2}\left(-1\right)+64
Multiply a and a to get a^{2}.
a\left(-a\right)-8a-8\left(-a\right)+64
Apply the distributive property by multiplying each term of a-8 by each term of -a-8.
a\left(-a\right)-8a+8a+64
Multiply -8 and -1 to get 8.
a\left(-a\right)+64
Combine -8a and 8a to get 0.
a^{2}\left(-1\right)+64
Multiply a and a to get a^{2}.
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