Scholarship Exam Preparation App
Class 8 - (Math )
Number Work - Natural numbers, whole numbers, integer rational numbers, irrational numbers, real numbers
Given two rational numbers x, y.
x + y = 1, x × y = 1/6
Which of the following is the value of x − y = ?
x + y = 1, x × y = 1/6
Which of the following is the value of x − y = ?
a :
1/2
b :
1/3
c :
1/6
d :
√(1/3)
Explanation :
(x − y)² = (x + y)² − 4xy = 1² − 4*(1/6) = 1 − 2/3 = 1/3x − y = √(1/3) = 1/√3 ≈ 0.577