Question 329084
6x+x(x-2)=0
6X+X^2-2X=0
X^2+4X=0
X(X+4)=0
X=0 ANS.
X+4=0
X=-4 ANS.
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f(x)=6x+x(x-2)
F(X)=6X+X^2-2X
F(X)=X^2+4X
{{{ graph( 300, 200, -6, 5, -10, 10, x^2 +4x) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10,  x^2 +4x). 
X intercepts=(-4,0) & (0,0) ans.