Let f(x)=ax2+bx+cf(x)=ax^2+bx+cf(x)=ax2+bx+c with f(0)=1f(0)=1f(0)=1, f(1)=3f(1)=3f(1)=3, f(−1)=1f(-1)=1f(−1)=1. Find aaa.
111
222
−1-1−1
000