Answer:
5
Step-by-step explanation:
Yes good job you are correct
(2x^4 - 6x^2+8) + (-x^4+ 2x^2-12)
=2x^4-6x^2-x^4+2x^2-12
=x^4-4x^2-12
Just watch your signs when opening up the brackets and then collect like terms.
Answer:
11.02
Step-by-step explanation: