SOLUTION: for which of the following equations are x=5and x=-5........................... A x2-x^2-5x-25=0.....B..x^2+25=0......C.. x^2+10x-25=0....D.. x^2-25=0

Algebra ->  Equations -> SOLUTION: for which of the following equations are x=5and x=-5........................... A x2-x^2-5x-25=0.....B..x^2+25=0......C.. x^2+10x-25=0....D.. x^2-25=0      Log On


   

Question 737638: for which of the following equations are x=5and x=-5........................... A x2-x^2-5x-25=0.....B..x^2+25=0......C.. x^2+10x-25=0....D.. x^2-25=0
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
D.x^2-25
(x+5)(x-5)=0
so x=5 or x=-5