Basic Math Examples

$\frac{\frac{z^{2 - 12 z + 35}}{z + 1}}{\frac{z^{2} + 3 z - 40}{z - 1}}$

Step 1

Multiply the numerator by the reciprocal of the denominator.

$\frac{z^{2 - 12 z + 35}}{z + 1} \cdot \frac{z - 1}{z^{2} + 3 z - 40}$

Step 2

Add $2$ and $35$ .

$\frac{z^{- 12 z + 37}}{z + 1} \cdot \frac{z - 1}{z^{2} + 3 z - 40}$

Step 3

Factor $z^{2} + 3 z - 40$ using the AC method.

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Step 3.1

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $- 40$ and whose sum is $3$ .

$- 5, 8$

Step 3.2

Write the factored form using these integers.

$\frac{z^{- 12 z + 37}}{z + 1} \cdot \frac{z - 1}{(z - 5) (z + 8)}$

Step 4

Multiply $\frac{z^{- 12 z + 37}}{z + 1}$ by $\frac{z - 1}{(z - 5) (z + 8)}$ .

$\frac{z^{- 12 z + 37} (z - 1)}{(z + 1) (z - 5) (z + 8)}$