Evaluate
\left(2y-5\right)^{2}
Expand
4y^{2}-20y+25
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\left(2y-5\right)^{2}
Multiply 2y-5 and 2y-5 to get \left(2y-5\right)^{2}.
4y^{2}-20y+25
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2y-5\right)^{2}.
\left(2y-5\right)^{2}
Multiply 2y-5 and 2y-5 to get \left(2y-5\right)^{2}.
4y^{2}-20y+25
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2y-5\right)^{2}.
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