Evaluate
x\left(9-20x\right)
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9x-20x^{2}
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6x^{3}-12x^{2}+9x-2x^{2}\left(3x+4\right)
Use the distributive property to multiply 3x by 2x^{2}-4x+3.
6x^{3}-12x^{2}+9x-6x^{3}-8x^{2}
Use the distributive property to multiply -2x^{2} by 3x+4.
-12x^{2}+9x-8x^{2}
Combine 6x^{3} and -6x^{3} to get 0.
-20x^{2}+9x
Combine -12x^{2} and -8x^{2} to get -20x^{2}.
6x^{3}-12x^{2}+9x-2x^{2}\left(3x+4\right)
Use the distributive property to multiply 3x by 2x^{2}-4x+3.
6x^{3}-12x^{2}+9x-6x^{3}-8x^{2}
Use the distributive property to multiply -2x^{2} by 3x+4.
-12x^{2}+9x-8x^{2}
Combine 6x^{3} and -6x^{3} to get 0.
-20x^{2}+9x
Combine -12x^{2} and -8x^{2} to get -20x^{2}.
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