Question

find the numerical difference of the root of the equation x squared minus 7 x minus 18 is equal to 0

Answer 1

x^-7x-18=0
x^+2x-9x-18=0
x(x+2)-9(x+2)=0
(x+2)(x-9)=0
x=-2
x=9
Numerical difference is 9-(-2)
=11

Answer 2

Step-by-step explanation:

x2+px+8=0

Let a and b are the roots of the given equation. Then,

a+b=−p

ab=8

a−b=2

(a−b)2=4

(a+b)2−4ab=4

p2−32=4

p2=36

p=±6