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Precalculus Examples

Popular Problems

Find Where Undefined/Discontinuous x^2-4x-21=0

$x^{2} - 4 x - 21 = 0$

Step 1

$x^{2} - 4 x - 21 = 0$

Step 2

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$

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