<PRE><B>Question 523529</B>
Write a quadratic equation in the variable x having the given numbers as solutions.
 Type the equation in standard form, ax^2+bx+c=0. Solution:10,only solution.
x=10
x=10
It will be a perfect square with factors 
(x-10)(x-10) = 0
FOIL
f(x) = x^2 -10x - 10x + 100
combine like terms
f(x) = x^2 - 20x + 100</PRE>