Bardzo prosze o zrobienie tych zadań będe bardzo wdzięczny.

zadanie 1 a) [latex](5+2x^3)^2=5^2+2cdot 5cdot 2x^3+(2x^3)^2=25+20x^3+4x^6[/latex] b) [latex](3x+1)(9x^2-3x+1)=(3x)^3+1^3 = 27x^3+1[/latex] zadanie 2 [latex]4x^3-12x^2+x-3=0\ 4x^2(x-3)+(x-3)=0\ (x-3)(4x^2+1)=0\ x-3=0\ x=3\ 4x^2+1=0\ 4x^2 eq -1[/latex] zadanie 3 [latex]W(x)=x^4+2x^3+ax^2-6x\ W(-2)=0\ 16 - 16 + 4a +12=0\ 4a=-12\ a=-3\ W(x)=x^4+2x^3-3x^2-6x\ x^4+2x^3-3x^2-6x=0\ x^3(x+2)-3x(x+2)=0\ (x+2)(x^3-3x)=0\ (x+2)x(x^2-3)=0\ x+2=0\ x=-2\ x=0\ x^2-3=0\ x^2=3\ x=sqrt3\ x=-sqrt3 [/latex]