Question

Pls explain the above questions

Answer 1

x²-2x-8

by middle term splitting,

x²+2x-4x-8

x(x+2)-4(x+2)

(x+2)(x-4)=0

x-2=0

x=2

and,

x+4=0

x=-4

so,zeroes are -2,4

now, verification,

x²-2x-8

where, a=1, b=-2, c=-8

sum of zeroes=-b/a

-2+4=-(-2)/1

2=2

now,

product of zeroes=c/a

-2×4=-8/1

-8=-8

hence, verified.

hope this answer will help you.