Expand
x^{2}-\frac{x}{25}+0.0004
Evaluate
\left(0.02-x\right)^{2}
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0.0004-0.04x+x^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(0.02-x\right)^{2}.
0.0004-0.04x+x^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(0.02-x\right)^{2}.
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