Evaluate
4+16x-2x^{2}
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4+16x-2x^{2}
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x^{2}+4x+4-3x\left(x-4\right)
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+2\right)^{2}.
x^{2}+4x+4-3x^{2}+12x
Use the distributive property to multiply -3x by x-4.
-2x^{2}+4x+4+12x
Combine x^{2} and -3x^{2} to get -2x^{2}.
-2x^{2}+16x+4
Combine 4x and 12x to get 16x.
x^{2}+4x+4-3x\left(x-4\right)
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+2\right)^{2}.
x^{2}+4x+4-3x^{2}+12x
Use the distributive property to multiply -3x by x-4.
-2x^{2}+4x+4+12x
Combine x^{2} and -3x^{2} to get -2x^{2}.
-2x^{2}+16x+4
Combine 4x and 12x to get 16x.
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Limits
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