Evaluate
9\left(2y-x\right)^{2}
Expand
9x^{2}-36xy+36y^{2}
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36y^{2}-36yx+9x^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(6y-3x\right)^{2}.
36y^{2}-36yx+9x^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(6y-3x\right)^{2}.
Examples
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Matrix
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Simultaneous equation
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Limits
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