Evaluate
\left(\frac{3x}{10}-\frac{y}{2}\right)^{2}
Expand
-\frac{3xy}{10}+\frac{9x^{2}}{100}+\frac{y^{2}}{4}
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0.09x^{2}-0.3xy+0.25y^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(0.3x-0.5y\right)^{2}.
0.09x^{2}-0.3xy+0.25y^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(0.3x-0.5y\right)^{2}.
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