Question

What must be added to 7z3 - 11z² – 129 to get 6z³ + 5z²+ 7z – 92 ? ​

Answer 1

Step-by-step explanation:

Let a must be added.

Then,

7z

3

−11z

2

−129+a=5z

2

+7z−92

→a=−7z

3

+16z

2

+7z+37

Thus, B is the correct answer.