( 10 c - 0,1 d ) ^ { 2 }
Evaluate
\left(-\frac{d}{10}+10c\right)^{2}
Expand
-2cd+\frac{d^{2}}{100}+100c^{2}
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100c^{2}-2cd+0,01d^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(10c-0,1d\right)^{2}.
100c^{2}-2cd+0,01d^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(10c-0,1d\right)^{2}.
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