Evaluate
3\left(x-4\right)\left(x+18\right)
Expand
3x^{2}+42x-216
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\left(3x+54\right)\left(x-4\right)
Use the distributive property to multiply 3 by x+18.
3x^{2}-12x+54x-216
Apply the distributive property by multiplying each term of 3x+54 by each term of x-4.
3x^{2}+42x-216
Combine -12x and 54x to get 42x.
\left(3x+54\right)\left(x-4\right)
Use the distributive property to multiply 3 by x+18.
3x^{2}-12x+54x-216
Apply the distributive property by multiplying each term of 3x+54 by each term of x-4.
3x^{2}+42x-216
Combine -12x and 54x to get 42x.
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