Expand
25b^{2}-20b+8
Evaluate
\left(5b-2\right)^{2}+4
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25b^{2}-20b+4+4
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(5b-2\right)^{2}.
25b^{2}-20b+8
Add 4 and 4 to get 8.
25b^{2}-20b+4+4
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(5b-2\right)^{2}.
25b^{2}-20b+8
Add 4 and 4 to get 8.
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