...intercept), you use the equation b^2-4ac=0. You plug in 20 for b, 25 for a, and k for c. You get: 625-80k=0. Then you can add 80k to both sides to...
2 Answers · Education & Reference · 07/08/2008
Because in any algebra problem, you can change the signs oppisite as long as they are only opposite, for example +7 - -x =3 (seven minus negative x equals three) you could change it to -7 + +x =-3(negative seven plus x equals negative 3) x=four It has to do with absolute value
2 Answers · Education & Reference · 05/11/2010
Kanada is Kool, lol
5 Answers · Education & Reference · 31/12/2007