Question 1174729
<pre><font face = "consolas" color = "indigo" size = 3><b>
Hi

4x^3-8x^2-9x+18=0   (x=2 is one solution)
2	4	-8	-9	18
		8	0	-18
	4	0	-9	0
   4x^2 - 9 = 0
   x^2 = 9/4
    x =  ± 3/2
    x = -3/2 0r 3/2  0r  2 
By graphing one can easily determine the solutions:
Recommend the free graph software  https://www.padowan.dk/download/ 
Wish You the Best in your Studies.
</font></b></pre>   

{{{drawing(300,300,   -6, 6, -6, 6, grid(1),
circle(2, 0,0.2),
circle(3/2, 0, 0.2),
circle(-3/2,0, 0.2),

graph( 300, 300, -6, 6, -6, 6,0,4x^3-8x^2-9x+18)) }}}