Question

a 2 - 9a + 20

it needs to be factored
it is also my birthday i tried to put one up but some one took it down because it wasnt about the subject so here is a question.

Answer 1

Answer.

Use the sum-product pattern. (a*2 − 9  + 20)

                                                   (a*2 −4a-5a + 20)

Common factor from the two pairs. (a*2 − 4a − 5a + 20)

                                                             ( a − 4 ) − 5 ( a − 4 )

Rewrite in factored form. a( a − 4 ) − 5 ( a − 4 )

                                              ( a − 5 ) ( a − 4 )