Real number calculator
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:
Forgiven real numbers, calculate the reciprocal numbers.
- Exponential equation
Solve exponential equation (in real numbers): 98x-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 x1 = -1 and x2 = 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? ?
By introducing a new variable solve biquadratic equation: ?
- Logarithmic equation
Solve equation: log33(3x + 21) = 0
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.
Use law of square roots roots: ?
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
Determine missing coordinate of the point M [x, 120] of the graph of the function f bv rule: y = 5x
- 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.
Event P has probability of 0.84. What is the probability that the event P occurs in 3, 5, 7 try.
next math problems »