Evaluate
\left(y-8\right)\left(y-2\right)
Expand
y^{2}-10y+16
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y^{2}-10y+25-9
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(y-5\right)^{2}.
y^{2}-10y+16
Subtract 9 from 25 to get 16.
y^{2}-10y+25-9
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(y-5\right)^{2}.
y^{2}-10y+16
Subtract 9 from 25 to get 16.
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