Question

Hey, care este calculul prescurtat la asta?$(x^{2} +1)^2$

Answer 1

=x^4 +2x^2 +1,
adica mergi dupa formula
(a+b)^2 = a^2 +2ab + b^2

Answer 2

(a+b)^2=a^2+2ab+b^2
a=x^2
b=1
(x^2+1)^2=x^4+2x^2+1