Evaluate
396x^{2}-50
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396x^{2}-50
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20^{2}x^{2}-4x^{2}-50
Expand \left(20x\right)^{2}.
400x^{2}-4x^{2}-50
Calculate 20 to the power of 2 and get 400.
396x^{2}-50
Combine 400x^{2} and -4x^{2} to get 396x^{2}.
20^{2}x^{2}-4x^{2}-50
Expand \left(20x\right)^{2}.
400x^{2}-4x^{2}-50
Calculate 20 to the power of 2 and get 400.
396x^{2}-50
Combine 400x^{2} and -4x^{2} to get 396x^{2}.
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