Expand
4y^{2}-28wy+49w^{2}
Evaluate
\left(2y-7w\right)^{2}
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4y^{2}-28yw+49w^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2y-7w\right)^{2}.
4y^{2}-28yw+49w^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2y-7w\right)^{2}.
Examples
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