Evaluate
-\frac{\left(2-x\right)^{2}}{2}
Expand
-\frac{x^{2}}{2}+2x-2
Graph
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-\frac{1}{8}\left(16-16x+4x^{2}\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(4-2x\right)^{2}.
-2+2x-\frac{1}{2}x^{2}
Use the distributive property to multiply -\frac{1}{8} by 16-16x+4x^{2}.
-\frac{1}{8}\left(16-16x+4x^{2}\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(4-2x\right)^{2}.
-2+2x-\frac{1}{2}x^{2}
Use the distributive property to multiply -\frac{1}{8} by 16-16x+4x^{2}.
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