+0  
 
0
44
2
avatar

What is the sum of all possible values of x such that 2x(x - 10) = -50 + 2x?

 Sep 7, 2021
 #1
avatar
0

Eleven

 Sep 7, 2021
 #2
avatar+114496 
+1

2x(x - 10) = -50 + 2x

 

\(2x(x - 10) = -50 + 2x\\ 2x^2-20x-2x+50=0\\ 2x^2-22x+50=0\\ 1x^2-11x+25=0\\ x=\frac{11\pm\sqrt{121-100}}{2}\\ \text{sum of the roots =}11\)

 Sep 13, 2021
edited by Melody  Sep 13, 2021

31 Online Users