Question

 упростите:

(1-x)(x+1)+(x-1)^2

Answer 1

$(1-x)(x+1)+(x-1)^{2} =(1-x)(1+x)+(x-1) ^{2} = \ \ =1- x^{2} + x^{2} +1-2x=1+1-2x=2-2x$