Question

if 1 and -2 are the two zeroes of the polynomial x³-4x²-7x+10 find its third zero​

Answer 1

Step-by-step explanation:

1 and - 2

(x-1) (x +2)

x(x+2) - 1(x+2)

x² +2x - 1x - 2

x² +1x - 2

After long division I got x - 5

x - 5 =0

x =0+5

x =5

Therefore the third zeroes is 5