Question 422791
 From the graph x= -2 is zero for the polynomial, thus x+2 is a factor and the polynomial can be written: {{{f(x)= (x+2)(10x^3-13x^2-x+4)}}}

 {{{ graph( 400, 400, -5, 5, -20, 10, 10x^4+7x^3-27x^2+2x+8)}}}