1.(3х-5y)(3x+y)= a)9x^2-25y^2 б)9x^2+25y^4 в)9x^2+25y^2 г)9x^2-25y^4 2.(a-2)(a^2+2a+4)=...

Question

1.(3х-5y)(3x+y)=
a)9x^2-25y^2
б)9x^2+25y^4
в)9x^2+25y^2
г)9x^2-25y^4
2.(a-2)(a^2+2a+4)=
a)a^3-8
Б)a^3+8
в)a^3-2a^2+8
г)a^3-16

Answer 1

..............1)а2)а