How do you simplify (7z ^ { 2} - 4z + 3) - ( - 9z ^ { 3} - 9z ^ { 2} - 5z )?

1 Answer
Nov 19, 2017

9z^3+16z^2+z+3

Explanation:

(7z^2-4z+3)-(-9z^3-9z^2-5z)=
=7z^2-4z+3+9z^3+9z^2+5z=
=9z^3+7z^2+9z^2-4z+5z+3=
=(9z^3)+(7z^2+9z^2)+(-4z+5z)+(3)=
=(9z^3)+(16z^2)+(z)+(3)=
=9z^3+16z^2+z+3