Expand
4k^{2}-80k+400
Evaluate
4\left(k-10\right)^{2}
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4\left(k^{2}-20k+100\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(k-10\right)^{2}.
4k^{2}-80k+400
Use the distributive property to multiply 4 by k^{2}-20k+100.
4\left(k^{2}-20k+100\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(k-10\right)^{2}.
4k^{2}-80k+400
Use the distributive property to multiply 4 by k^{2}-20k+100.
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