First add y and z

y = 3x^3 + x^2 – 5 and z = x^2 – 12

What like terms do you see? Combine them — be careful of the signed integers

Then double all the terms for 2(y + z)

First add y and z

y = 3x^3 + x^2 – 5 and z = x^2 – 12

What like terms do you see? Combine them — be careful of the signed integers

Then double all the terms for 2(y + z)