Evaluate
21-19x-8x^{2}
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21-19x-8x^{2}
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-8x^{2}-24x+6x+18-x+3
Apply the distributive property by multiplying each term of -4x+3 by each term of 2x+6.
-8x^{2}-18x+18-x+3
Combine -24x and 6x to get -18x.
-8x^{2}-19x+18+3
Combine -18x and -x to get -19x.
-8x^{2}-19x+21
Add 18 and 3 to get 21.
-8x^{2}-24x+6x+18-x+3
Apply the distributive property by multiplying each term of -4x+3 by each term of 2x+6.
-8x^{2}-18x+18-x+3
Combine -24x and 6x to get -18x.
-8x^{2}-19x+18+3
Combine -18x and -x to get -19x.
-8x^{2}-19x+21
Add 18 and 3 to get 21.
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