Evaluate
\left(x+8.69\right)^{2}
Expand
x^{2}+\frac{869x}{50}+75.5161
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75.5161+17.38x+x^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(8.69+x\right)^{2}.
75.5161+17.38x+x^{2}
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(8.69+x\right)^{2}.
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