# Real number calculator

## Result:

### 0.75 0.75

=Real numbers are numbers that can be found on the number line. This includes the natural numbers( 1,2,3 ...), integers (-3) rational (fractions) and irrational numbers (like √2 or π). Positive or negative, large or small, whole numbers or decimal numbers are all

**real numbers**. Imaginary numbers and complex numbers cannot be draw in number line, but in complex plane.

#### Examples:

• addition of real numbers: -3/2 + pi/2• subtraction of real numbers: 32.14 - 67.32

• parenthesis: sin(pi/2) * (1.1+2.2+3.3)

• Complex example: Priority of operators and brackets: 3⋅[8−(−1) + (−3)÷(−3)]^2

## Real numbers in word problems:

- Reciprocal

Forgiven real numbers, calculate the reciprocal numbers. - Exponential equation

Solve exponential equation (in real numbers): 9^{8x-2}=9 - Mixing operations with numbers

Subtract twice the number -23.6 from the difference of the numbers -130 and -40.2. - Quadratic equation

Determine the numbers b, c that the numbers x_{1}= -1 and x_{2}= 3 were roots of quadratic equation: ? - Imaginary numbers

Find two imaginary numbers whose sum is a real number. How are the two imaginary numbers related? What is its sum? - Distance of numbers

Which number has the same distance from the numbers -5.65 and 7.25 on the numerical axis? - Is equal

Is equal following terms? ? - Biquadratic

By introducing a new variable solve biquadratic equation: ? - Logarithmic equation

Solve equation: log_{33}(3x + 21) = 0 - Factors

Can the expression ? be factored into rational factors? - Real estate

Residential house has three entrances numbered by odd numbers arithmetic progression. The sum of the two numbers on the corner entrances is 50. Calculate the highest of this three numbers. - Root

Use law of square roots roots: ? - Cotangent

If the angle α is acute, and cotg α = 1/3. Determine the value of sin α, cos α, tg α. - Cube root

Find cube root of 18 - Coordinate

Determine missing coordinate of the point M [x, 120] of the graph of the function f bv rule: y = 5^{x} - Geometric mean

Calculate the geometric mean of numbers a=15.2 and b=25.6. Determine the mean by construction where a and b are the length of the lines. - Events

Event P has probability of 0.84. What is the probability that the event P occurs in 3, 5, 7 try.

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