Evaluate
12\left(2x-y\right)^{2}
Expand
48x^{2}-48xy+12y^{2}
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3\left(16x^{2}-16xy+4y^{2}\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(4x-2y\right)^{2}.
48x^{2}-48xy+12y^{2}
Use the distributive property to multiply 3 by 16x^{2}-16xy+4y^{2}.
3\left(16x^{2}-16xy+4y^{2}\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(4x-2y\right)^{2}.
48x^{2}-48xy+12y^{2}
Use the distributive property to multiply 3 by 16x^{2}-16xy+4y^{2}.
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