Question

resta la sima de 5n^2-3n-2y-7n^2+n+2 de -12n3-n+a

Answer 1

$(5n^2-3n-2y-7n^2+n+2)-(-12n^3-n-a)= \\ (-2n^2-2n-2y+2)+(12n^3+n+a)= \\ -2n^2-2n-2y+2+12n^3+n+a= \\ a+12n^3-2n^2-n-2y+2$