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Evaluate
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Differentiate w.r.t. x
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2x^{2}-\frac{784}{4^{2}}
Calculate 28 to the power of 2 and get 784.
2x^{2}-\frac{784}{16}
Calculate 4 to the power of 2 and get 16.
2x^{2}-49
Divide 784 by 16 to get 49.
\frac{\mathrm{d}}{\mathrm{d}x}(2x^{2}-\frac{784}{4^{2}})
Calculate 28 to the power of 2 and get 784.
\frac{\mathrm{d}}{\mathrm{d}x}(2x^{2}-\frac{784}{16})
Calculate 4 to the power of 2 and get 16.
\frac{\mathrm{d}}{\mathrm{d}x}(2x^{2}-49)
Divide 784 by 16 to get 49.
2\times 2x^{2-1}
The derivative of a polynomial is the sum of the derivatives of its terms. The derivative of a constant term is 0. The derivative of ax^{n} is nax^{n-1}.
4x^{2-1}
Multiply 2 times 2.
4x^{1}
Subtract 1 from 2.
4x
For any term t, t^{1}=t.