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8a^{2}+50
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8a^{2}+50
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4a^{2}-20a+25+\left(2a+5\right)^{2}
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(2a-5\right)^{2}.
4a^{2}-20a+25+4a^{2}+20a+25
Use binomial theorem \left(p+q\right)^{2}=p^{2}+2pq+q^{2} to expand \left(2a+5\right)^{2}.
8a^{2}-20a+25+20a+25
Combine 4a^{2} and 4a^{2} to get 8a^{2}.
8a^{2}+25+25
Combine -20a and 20a to get 0.
8a^{2}+50
Add 25 and 25 to get 50.
4a^{2}-20a+25+\left(2a+5\right)^{2}
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(2a-5\right)^{2}.
4a^{2}-20a+25+4a^{2}+20a+25
Use binomial theorem \left(p+q\right)^{2}=p^{2}+2pq+q^{2} to expand \left(2a+5\right)^{2}.
8a^{2}-20a+25+20a+25
Combine 4a^{2} and 4a^{2} to get 8a^{2}.
8a^{2}+25+25
Combine -20a and 20a to get 0.
8a^{2}+50
Add 25 and 25 to get 50.
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