Question

how to solve x(x-4)+y(y+6)=12​

Answer 1

here is your answer mate

X square-4x +ysquare +6y=12

Answer 2

HERE is your answer !!!!

x(x-4)+y(y+6)=12

x^2-4x+y^2+6y=12

(rearranging in order)

x^2+y^2-4x+6y=12

x^2+y^2-(4x+6y)=12