Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$P(x)=50 \sqrt{ x } -0.5x-75$$

Evaluate

$-\frac{x}{2}+50\sqrt{x}-75$

Differentiate w.r.t. x

$-0.5+\frac{25}{\sqrt{x}}$

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