question 4 and 5 all parts

4. For each of the following polynomial equations, determine if x = i is a root. (a)x32x2+3x-2=0 (c)3x4x2+2x4=0 (b) 29 x2+x2=0 5. Find the rational roots; if any, of the following: (a)x34x2+x+6=0 (c)x3+%XZ%x%=O (b)8x3+6x23x1=0 (cowsnug Zgx_2=o