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\frac{1}{2}\left(x^{2}-2x+1\right)+1
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-1\right)^{2}.
\frac{1}{2}x^{2}-x+\frac{1}{2}+1
Use the distributive property to multiply \frac{1}{2} by x^{2}-2x+1.
\frac{1}{2}x^{2}-x+\frac{3}{2}
Add \frac{1}{2} and 1 to get \frac{3}{2}.
\frac{1}{2}\left(x^{2}-2x+1\right)+1
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-1\right)^{2}.
\frac{1}{2}x^{2}-x+\frac{1}{2}+1
Use the distributive property to multiply \frac{1}{2} by x^{2}-2x+1.
\frac{1}{2}x^{2}-x+\frac{3}{2}
Add \frac{1}{2} and 1 to get \frac{3}{2}.