Algebra Examples

$x^{2} - 2 x - 80$

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 $- 80$ and whose sum is $- 2$ .

$- 10, 8$

Step 2

Write the factored form using these integers.

$(x - 10) (x + 8)$