Question

Rezolvatimi varog exercitiile
(12x+1)*(12x-1)
(5-2x)*(5+2x)
(3,6+2,1x)*(3,6-2,1x)
(x patrat-2x-1) totul la a 2-a

Answer 1

144x^2-1 conform (a+b)(a-b)=a^2-b^2
25-4x^2
3,6^2-(2,1x)^2
(x^2-2x-1)(x^2-2x-1)=x^4-2x^3-x^2-2x^3+4x^2+2x-x^2+2x+1=x^4-4x^3+4x^2+4x+1