what is the goal? to simplify? if so it would be:
12z^4-4z^3+21z-7
z^2 means z squared, z^3 z cubed, etc.
i assumed that the 4z3 at the beginning was four z cubed...
4z3(3z-1)+7(3z-1)
2 answers
4z^3*(3z-1)+7(3z-1)=
4z^3*(3z-1)+(7*3)*z+7*(-1)=
4z^3*3z+4z^3*(-1)+21z-7=
12z^4-4z^3+21z-7
By the way in google type:
Expessions Simplifier
When you see list of results click on:
Expessions Simplifier and Solver-Algebra com
When page be open in rectacangle type your equation 4z3(3z-1)+7(3z-1)
and click option SOLVE OR SIMPLIFY
You will se solution step-by-step
On that site you can simplify any kind of equation.
4z^3*(3z-1)+(7*3)*z+7*(-1)=
4z^3*3z+4z^3*(-1)+21z-7=
12z^4-4z^3+21z-7
By the way in google type:
Expessions Simplifier
When you see list of results click on:
Expessions Simplifier and Solver-Algebra com
When page be open in rectacangle type your equation 4z3(3z-1)+7(3z-1)
and click option SOLVE OR SIMPLIFY
You will se solution step-by-step
On that site you can simplify any kind of equation.