Question 263572
Here is the original problem
{{{6x^3+54x^2+120x=0 }}}
step 1 - factor out 6x to get
{{{6x(x^2 + 9x + 20) = 0}}}
step 2 - factor the trinomial to get
{{{6x(x+4)(x+5) = 0}}}
step 3 - set each part = 0 and solve to get
x = 0
x = -4
x = -5
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not sure why you would use x=y^2 to solve this question.