To which set of real numbers does zero belong

what are real numbers

For all real numbers a and b, 2a • b = a^2 + b^2

Let x and y be real numbers such that x^2 + y^2 = 1. Find the maximum value of 2x - 5y.

if x and y are real numbers such that 0<x<y^2, then which of the following inequalities must be true...

If x and y are real numbers find the minimum value of x^2+2xy+2y^2+6y

all real numbers less than 1 unit from 4

All real numbers less than 69

The real numbers $x$ and $y$ satisfy the equation $x^2+y^2=14x+48y-8x-26y+16$. What is the minimum v...

the sum of the real numbers x and y is 11 their difference is 5 what is the value of xy

Question