(x-1)(x+3)+1
=x^2+2x-2
=(x-1)^2-3
=(x-1+根号3)(x-1-根号3)
(x-1)(x+3)+1
=x^2+2x-3+1
=x^2+2x-2
=(x-1+√5)(x-1-√5)
(x-1)(x+3)+1
=x^2+2x-3+1
=x^2+2x+1-5
=(x+1)^2-5
=(x+1-√5)(x+1+√5)
(x-1)(x+3)+1=x^2+2x-2=x^2+2x+1-3=(x+1)^2-3=(x+1+根号3)-(x+1-根号3)
(x-1)(x+3)+1
=x²+2x-3+1
=x²+2x-2
=(x-1+√3)(x-1-√3)