Evaluate
-3\left(x+2\right)^{2}-1
Expand
-3x^{2}-12x-13
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-3\left(x^{2}+4x+4\right)-1
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+2\right)^{2}.
-3x^{2}-12x-12-1
Use the distributive property to multiply -3 by x^{2}+4x+4.
-3x^{2}-12x-13
Subtract 1 from -12 to get -13.
-3\left(x^{2}+4x+4\right)-1
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+2\right)^{2}.
-3x^{2}-12x-12-1
Use the distributive property to multiply -3 by x^{2}+4x+4.
-3x^{2}-12x-13
Subtract 1 from -12 to get -13.
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