Question

12(ab+b-a) + 13 + (3a-2b)^2=0

Answer 1

Упростим:
12(ab+b-a) + 13 + (3a-2b)^2=0
12ab+12b-12a+13+9a²-12ab+4b²=0
12b-12a+9a²+4b²=-13