а) 25х^2-у^2= (5х-у)(5х+у)
б) -m^2+16n^2= (4n-m)(4n+m)
в) 36a^2-49= (6a-7)(6a+7)
г) 64-25х^2=(8-5x)(8+5x)
д) 9m^2-16n^2=(3m-4n)(3m+4n)
е) 64р^2-81q^2=(8p-9q)(8p+9q)
ж) -49а^2+16b^2= (4b-7a)(4b+7a)
з) 0,01n^2-4m^2=(0,1n-2m)(0,1n+2m)
и) 9-b^2c^2=(3-bc)(3+bc)
к) 4a^2b^2-1=(2ab-1)(2ab+1)
л) р^2-a^2b^2=(p-ab)(p+ab)
м) 16с^2d^2-9a^2=(4cd-3a)(4cd+3a)