Question

6b/7a - (49 a^2 + 36b^2)/42 ab+(7a-36b)/6b решите уравнение если а=-39 b=99

Answer 1

6b/7a - (49 a^2 + 36b^2)/42 ab+(7a-36b)/6b = (36b^2 - (49 a^2 + 36b^2) + (7a-36b)*7a)/42 ab = (-49 a^2 + 49a^a  - 7*36ab)/42ab = - 7*36ab/42ab = -6.