А) 9а^2-4=(3а-2)(3а+2)
б) 25х^2-1=(5х-1)(5х+1)
в) 1/4m^2-16n^2=(1/2m-4n)(1/2m+4n)
г) 100а^2-0,25b^2=(10a-0,5b)(10a+0,5b)
д) x^12-y^2=(x^6-y)(x^6+y)
е) m^6-n^6=(m^3-n^3)(m^3+n^3)
ж) 2 1/4-c^4=9/4-c^4=(3/2-c^2)(3/2+c^2)
з) 1 9/16a^10-0,01b^2=25/16a^10-0,01b^2=(5/4a^5-0,1b)(5/4a^5+b)
и) x^4-y^4=(x^2-y^2)(x^2+y^2)