Evaluate
3\left(7x-2\right)\left(x+2\right)
Expand
21x^{2}+36x-12
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21x^{2}-6x+42x-12
Apply the distributive property by multiplying each term of 3x+6 by each term of 7x-2.
21x^{2}+36x-12
Combine -6x and 42x to get 36x.
21x^{2}-6x+42x-12
Apply the distributive property by multiplying each term of 3x+6 by each term of 7x-2.
21x^{2}+36x-12
Combine -6x and 42x to get 36x.
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