Basic Math Examples

$k^{2} + 4 k - 45$

Step 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 $- 45$ and whose sum is $4$ .

$- 5, 9$

Step 2

Write the factored form using these integers.

$(k - 5) (k + 9)$