your answer is x = -1 and x = 3 !!
step 1.) write -2x as a difference
step 2.) factor out x from the expression
step 3.) factor out -3 from the expression
step 4.) factor out x + 1
step 5.) when the product of factors equals 0, at least one factor is 0
step 6.) solve the equation for x
hence your answer would be x = -1 and x = 3 !!
