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45-18x
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45-18x
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x^{2}-14x+49-x^{2}-4x-4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-7\right)^{2}.
-14x+49-4x-4
Combine x^{2} and -x^{2} to get 0.
-18x+49-4
Combine -14x and -4x to get -18x.
-18x+45
Subtract 4 from 49 to get 45.
x^{2}-14x+49-x^{2}-4x-4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-7\right)^{2}.
-14x+49-4x-4
Combine x^{2} and -x^{2} to get 0.
-18x+49-4
Combine -14x and -4x to get -18x.
-18x+45
Subtract 4 from 49 to get 45.
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Limits
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