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20x^{2}+6x-54
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20x^{2}+6x-54
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20x^{2}-30x+36x-54
Apply the distributive property by multiplying each term of 5x+9 by each term of 4x-6.
20x^{2}+6x-54
Combine -30x and 36x to get 6x.
20x^{2}-30x+36x-54
Apply the distributive property by multiplying each term of 5x+9 by each term of 4x-6.
20x^{2}+6x-54
Combine -30x and 36x to get 6x.
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