I NEED HELP PLEASE I DONT UNDERSTAND AND CANT FAIL

Select the quadratic that has root x = 8 and x = -5

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41