Solve each polynomial equation. If a solution occurs more than once, state it's multiplicity.
4x^4-13^2+9=0
Please show work I need help
let z^2=z
4z^2-13z +9=0
(4z -9)(z-1)=0
z= 9/4 z= 1
x^2=9/4 x^2=1
x= +- 3/2 x= +-1 four solutions