Evaluate
5x\left(x-4\right)\left(x+3\right)
Expand
5x^{3}-5x^{2}-60x
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\left(5x^{2}+15x\right)\left(x-4\right)
Use the distributive property to multiply 5x by x+3.
5x^{3}-20x^{2}+15x^{2}-60x
Apply the distributive property by multiplying each term of 5x^{2}+15x by each term of x-4.
5x^{3}-5x^{2}-60x
Combine -20x^{2} and 15x^{2} to get -5x^{2}.
\left(5x^{2}+15x\right)\left(x-4\right)
Use the distributive property to multiply 5x by x+3.
5x^{3}-20x^{2}+15x^{2}-60x
Apply the distributive property by multiplying each term of 5x^{2}+15x by each term of x-4.
5x^{3}-5x^{2}-60x
Combine -20x^{2} and 15x^{2} to get -5x^{2}.
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