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Q: Does inequality always has a real number solution?
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Which inequality has all real number as its solution?

x2 ≥ 0 is one possible answer.


Why does an inequality have 2 solutions?

An inequality, like an equation, can have a different number of solutions depending on the inequality and the domain.For example, x2< 0 has no solutions if the domain is the real numbers.x< 5 has only one solution ( = 4) if the domain consists of the squares of positive even numbers.x < 5 has infinitely many solutions if the domain is the rational numbers or real numbers.An inequality, like an equation, can have a different number of solutions depending on the inequality and the domain.For example, x2< 0 has no solutions if the domain is the real numbers.x< 5 has only one solution ( = 4) if the domain consists of the squares of positive even numbers.x < 5 has infinitely many solutions if the domain is the rational numbers or real numbers.An inequality, like an equation, can have a different number of solutions depending on the inequality and the domain.For example, x2< 0 has no solutions if the domain is the real numbers.x< 5 has only one solution ( = 4) if the domain consists of the squares of positive even numbers.x < 5 has infinitely many solutions if the domain is the rational numbers or real numbers.An inequality, like an equation, can have a different number of solutions depending on the inequality and the domain.For example, x2< 0 has no solutions if the domain is the real numbers.x< 5 has only one solution ( = 4) if the domain consists of the squares of positive even numbers.x < 5 has infinitely many solutions if the domain is the rational numbers or real numbers.


Is the solution to a quadratic inequality in one variable always a compound inequality?

Yes - except in extreme cases. It can be the whole of the Real Numbers: eg x2 &gt; -3 It can be a single point eg x2 &acirc;&permil;&curren; 0 gives x = 0


Can a quadratic inequality have a solution set that is all real numbers?

Yes. Consider x2 &acirc;&permil;&yen; 0


What is solution of x2 equals -1 in real number?

3


Is a fraction a real solution or a non-real solution in algebra?

A fraction is just a number. It's as real as any whole number (or decimal).


How to solve the real number?

A real number is not a question nor an equation or inequality that can be solved. There may be questions associated with real numbers that may be solved but that is not the same as solving the real number. The question is like asking how someone can solve you!


Can a square of real number is a real number?

The square of a real number is always a real number.


Why is it better to solve quadratic equations in the complex number system rather than in the real number system?

It is not always better.Although quadratic equations always have solutions in the complex system, complex solutions might not always make any sense. In such circumstances, sticking to the real number system makes more sense that trying to evaluate an impossible solution in the complex field.


Is the quotient of two rational numbers always a real number?

A real number is any number so yes it is always a real number * * * * * Except if the second number is 0, in which case the quotient is not defined.


Is every rational number a real number true or false?

Yes. Rational numbers are always the quotient of two integers. Integers are always real, and you cannot divide a real number by another real number and get an imaginary number. So, true.


Is a real number always sometimes or never a rational number?

Sometimes. The number '4' is real and rational. The number 'pi' is real but not rational.