Question 532142
a. 
(2x-5)^2 = 9
so
2x-5 = +/- 3
.
2x -5 = 3
2x = 8
x = 4
.
2x -5 = -3
2x = 2
x = 1
.
{{{ graph(500,500,-5,10,-10,25,(2*x-5)^2-9) }}}
.
.