Now, we can write down the "2" ; and factor the: "</span>(x² − x − 20)" ;
2 * (x² − x − 20) ; _______________________________________________________ Take a look at: "(x² − x − 20)" ; we have "-1x" and "-20" ;
so, -5 and +4 ; or; +5 and -4 ; to get "-20" ; _______________________ (we choose the "5" and "4" factors of "-20" because we also have "-1" ; and "5 -4 =1" ; Now, (-5 + 4 = -1) ; and: (+5 - 4 = +1). So; we'll stick with (-5 + 4) ;
(x² − x − 20) = (x − 5)(x + 4) ; ________________________________________________ Then, bring down the "2" ; and we have our answer: __________________________________________________ " 2x² − 2x − 40 "
= " <span>2(x − 5)(x + 4) " ; which is: Answer choice: [A] . _______________________________________________</span>