Evaluate
\frac{\left(1-2y\right)^{2}}{4}
Expand
y^{2}-y+\frac{1}{4}
Graph
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\left(\frac{1}{2}-y\right)^{2}
Multiply \frac{1}{2}-y and \frac{1}{2}-y to get \left(\frac{1}{2}-y\right)^{2}.
\frac{1}{4}-y+y^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(\frac{1}{2}-y\right)^{2}.
\left(\frac{1}{2}-y\right)^{2}
Multiply \frac{1}{2}-y and \frac{1}{2}-y to get \left(\frac{1}{2}-y\right)^{2}.
\frac{1}{4}-y+y^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(\frac{1}{2}-y\right)^{2}.
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