Разложите на множители а^2-16b^2= 25-9c^2= 36p^2-121m^2= -9^2+4b^2= 0,09x^2y^2+1=

А^2-16b^2=a^2-(4b)^2=(a-4b)(a+4b)
25-9c^2=5^2-(3c)^2=(5-3c)(5+3c)
36p^2-121m^2=(6p)^2-(11m)^2=(6p-11m)(6p+11m)
-9^2+4b^2=(2b)^2-9^2=(2b-9)(2b+9)
0,09x^2y^2-1=(0.3xy)^2-1^2=(0.3xy-1)(0.3xy+1)