Evaluate
\left(r-2\right)^{2}+36
Expand
r^{2}-4r+40
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36+\left(r-2\right)^{2}
Calculate 6 to the power of 2 and get 36.
36+r^{2}-4r+4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(r-2\right)^{2}.
40+r^{2}-4r
Add 36 and 4 to get 40.
36+\left(r-2\right)^{2}
Calculate 6 to the power of 2 and get 36.
36+r^{2}-4r+4
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(r-2\right)^{2}.
40+r^{2}-4r
Add 36 and 4 to get 40.
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