Question

Given the polynomial 21x 4 + 3y - 6x 2 + 34

What polynomial must be subtracted from it to obtain 29x 2 - 7 ?
What polynomial must be added to it to obtain a first degree polynomial?

Answer 1

what is 21x4 is it 21x to the power of 4?

Answer 2

assuming it is....

for the first question, we apply the basic rule of subtraction:
a-b=c
a-c=b
So for example 9-4=5 and 9-5=4

So 21x 4 + 3y - 6x 2 + 34 minus the polynomial we want to find = 29x2-7
likewise, 21x 4 + 3y - 6x 2 + 34 minus 29x2-7=the polynomial we want to find.
so simply subtract 29x2-7 from 21x 4 + 3y - 6x 2 + 34 and you should get the answer