Finding roots in a polynomial function

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?

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

In angle pqr find the measure of