In Maple, how would you find all the real and/or complex roots of this quartic function?
14*x^4 + 70*x^3 + 160*x^2 + 80*x - 221
14*x^4 + 70*x^3 + 160*x^2 + 80*x - 221
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> fsolve(14*x^4+70*x^3+160*x^2+80*x-221, x, complex);
-2.378334921, -1.723629874 - 2.251335859 I, -1.723629874 + 2.251335859 I, 0.8255946699
-2.378334921, -1.723629874 - 2.251335859 I, -1.723629874 + 2.251335859 I, 0.8255946699