Question

разложите на множители:1)4x^2y^2-9a^4
2)25a^2-(a+3)^2

Answer 1

1) (2xy-3a^2)(2xy+3a^2)=4x^2y^2-9a^4
2)25a^2-(a+3)^2=(5a-(a+3))(5a+(a+3))=(5a-a-3)(5a+a+3)=(4a-3)(6a+3)