Question

pls explain sum of the zeroes of the polynomial P(X) is equals to X²-kX+ 9 is 7 find the value of k​

Answer 1

ax2+bx+c= x2-kx+9

b2-4ac= k2-4×9=k2-36 (D=b2-4ac)

k2-36=0

k2=36

k=√36

k=6