Given the polynomial 21x^4 + 3y - 6x^2 + 34
1. what polynomial must be subtracted from it to obtain 29x^2-7?
2. what polynomial must be added to it to obtain a first degree polynomial?

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.