If the polynomial P(x)=x4−6x3+13x2−12x+4P(x) = x^4 - 6x^3 + 13x^2 - 12x + 4P(x)=x4−6x3+13x2−12x+4 is a perfect square (x2+ax+b)2(x^2 + ax + b)^2(x2+ax+b)2, what are aaa and bbb?
a=3,b=2a=3, b=2a=3,b=2
a=−3,b=2a=-3, b=2a=−3,b=2
a=−3,b=−2a=-3, b=-2a=−3,b=−2
a=3,b=−2a=3, b=-2a=3,b=−2