Lets solve for X (-a)(x)+4b>9 --------------------------------------------------------- Step one: Add -4b to both sides --------------------------------------------------------- -ax+4b+-4b>9+-4b -ax>-4b+9 -------------------------------------------------------- Step 2: divide both d=sides by -a -------------------------------------------------------- -ax/-a > -4b+9/-a ------------------------------------------------------- ANSWER: x < 4b-9/a ------------------------------------------------------
The correct answer for part A is 5x² +7x -4. 5x³ -x² -8x -7 is the right answer for part B. Polynomials are always closed if under addition or subtraction. The answers of both parts A and B are polynomials. hope that helps let me know if it does
