Let f(x)=x4+ax3+bx2+c be a polynomial with real coefficients such that f(1)=−9. Suppose that i3 is a root of the equation 4x3+3ax2+2bx=0, where i=−1. If α1,α2,α3, and α4 are all the roots of the equation f(x)=0, then ∣α1∣2+∣α2∣2+∣α3∣2+∣α4∣2 is equal to ________.