Vladas believes that an equation with a squared term is never a function of x. Which equation can be used to show Vladas that his hypothesis is incorrect? x + y2 = 25
x2 – y = 25
x2 + y2 = 25
x2 – y2 = 25

Solution:

The equation with a squared term is never a function of x stated by Vladas.

This is the statement regarding Pythagorean theorem which states that Square of two natural number is third number , these numbers  when assigned to a triangle forms a right angled triangle , the angle between two smaller sides is of 90°.

Among the four hypothesis given:

Option (C) : x²+ y²=  25 is true.