Evaluate
-\left(a-6\right)\left(a-3\right)
Expand
-\left(a^{2}-9a+18\right)
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\left(-a-\left(-3\right)\right)\left(a-6\right)
To find the opposite of a-3, find the opposite of each term.
\left(-a+3\right)\left(a-6\right)
The opposite of -3 is 3.
-a^{2}+6a+3a-18
Apply the distributive property by multiplying each term of -a+3 by each term of a-6.
-a^{2}+9a-18
Combine 6a and 3a to get 9a.
\left(-a-\left(-3\right)\right)\left(a-6\right)
To find the opposite of a-3, find the opposite of each term.
\left(-a+3\right)\left(a-6\right)
The opposite of -3 is 3.
-a^{2}+6a+3a-18
Apply the distributive property by multiplying each term of -a+3 by each term of a-6.
-a^{2}+9a-18
Combine 6a and 3a to get 9a.
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