Question 1[Maximum number: 3]Let f(x)=x4+0.2x3−5.8x2−x+4,x∈Rf(x)=x^{4}+0.2 x^{3}-5.8 x^{2}-x+4, x \in \mathbb{R}f(x)=x4+0.2x3−5.8x2−x+4,x∈R.Find the solutions of f(x)>0.Mark as masteredShow Answervalid method eg, sketch of curve or critical values foundx<−2.24,x>2.24,A1−1<x<0.8A1\begin{array}{ll} x<-2.24, x>2.24, & \boldsymbol{A 1} \\ -1<x<0.8 & \boldsymbol{A 1} \end{array}x<−2.24,x>2.24,−1<x<0.8A1A1Note: Award M1A1A0 for correct intervals but with inclusive inequalities.Add to Test