Решите в тетради: A) 25-x² Б) c²-36 B) (8-y)(8+y) г) (9a-x)(9а-х)​

\bf 250x^2=5^2-x^2=(5-x)(5+x)\\c^2-36=c^2-6^2=(c-6)(c+6)\\(8-y)(8+y)=8^2-y^2=64-y^2\\(9a-x)(9a+x)=(9a)^2-x^2=81a^2-x^2