[填空题]
Two distinct roots for the1zp (ys kfl *a9zn/8yq ac:l/jtx78j c polynomial equation $z^{4}-10 z^{3}+c z^{2}+d z+170 $ are $a+\mathrm{i}$ and $1+\mathrm{i}$ b where $a, b, c, d \in \mathbb{Z}$, b>0 .
1. Write down the other two roots in terms of a and b .
2. Find the value of a and the value of b . a = b =
