If `x^2 - 4x + 3 = 0`, then what is the value of `(x - 2)^2`?

If both expression x^2 - 3x + 2 and x^2 - 4x + 3 equal 0. then what is the value of (x - 3)^2 ?

If 4x + 3a = 0 , then what is the value of (x^(2) + ax + a^(2))/(x^(3) - a^(3)) -(x^(2) -ax + a^(2))/(x^(3) + a^(3)) ?

If x^2-4x+ 1 =0 , the what is the value of x^9 + x^7 - 194x^5 - 194x^3 ?