Домашно (x^2-y^2)^2, (a^2b-ab2)^2

[s0bieski]

1.(x^2-y^2)^2
2.(a^2b-ab2)^2
3.(a^2+[tex]\frac{1}{ a}[/tex] ^2)
4.(12c^2-7a^2).(12c^2-7a^2)
5.(5-a^2b).(5-a^2b)

[kucheto]

1.[tex](x^2-y^2)^2=x^4-2x^2y^2+y^4[/tex]
2.[tex](a^2b-ab^2)^2=a^4b^2-2a^3b^3+a^2b^4[/tex]
3.[tex](a^2+\frac{1}{a})^2=a^4+2a+\frac{1}{a^2}[/tex]
4.[tex](12c^2-7a^2)^2=144c^4-168a^2c^2+49a^4[/tex]
5.[tex](5-a^2b)^2=25-10a^2b+a^4b^2[/tex]