Question

a)x^2*y^2 -9y^2
б) 64a^2*b-a^6*b^4
Помогите решить

Answer 1

1)x^2*y^2-9y^2=(xy)^2-(3y)^2=(xy-3y)(xy+3y)
2)64a^2*b-a^6b^4=a^2b(64-a^3b^3)=a^2b(4^3-(ab)^3)=a^2b(4-ab)(16+4ab+a^2b^2)