Question

Решите срочно пожалуйста!!!

Answer 1

1)$36a ^{12} b^7/54a^8b ^{11} =2a^4/3b^4$
2)9m(2n-3)/9mn=(2n-3)/n
3)3(c+5)/[(c-5)(c+5)]=3/(c-5)
4)(7-x)²/[(7-x)(7+x)]=(7-x)/(7+x)