Evaluate
10x^{2}+x-21
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10x^{2}+x-21
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10x^{2}+5x-14x-7+10x-14
Apply the distributive property by multiplying each term of 5x-7 by each term of 2x+1.
10x^{2}-9x-7+10x-14
Combine 5x and -14x to get -9x.
10x^{2}+x-7-14
Combine -9x and 10x to get x.
10x^{2}+x-21
Subtract 14 from -7 to get -21.
10x^{2}+5x-14x-7+10x-14
Apply the distributive property by multiplying each term of 5x-7 by each term of 2x+1.
10x^{2}-9x-7+10x-14
Combine 5x and -14x to get -9x.
10x^{2}+x-7-14
Combine -9x and 10x to get x.
10x^{2}+x-21
Subtract 14 from -7 to get -21.
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