Mister Exam

Other calculators

2x²-3x+10<0 inequation

A inequation with variable

The solution

You have entered [src]
   2               
2*x  - 3*x + 10 < 0
(2x23x)+10<0\left(2 x^{2} - 3 x\right) + 10 < 0
2*x^2 - 3*x + 10 < 0
Detail solution
Given the inequality:
(2x23x)+10<0\left(2 x^{2} - 3 x\right) + 10 < 0
To solve this inequality, we must first solve the corresponding equation:
(2x23x)+10=0\left(2 x^{2} - 3 x\right) + 10 = 0
Solve:
This equation is of the form
a*x^2 + b*x + c = 0

A quadratic equation can be solved
using the discriminant.
The roots of the quadratic equation:
x1=Db2ax_{1} = \frac{\sqrt{D} - b}{2 a}
x2=Db2ax_{2} = \frac{- \sqrt{D} - b}{2 a}
where D = b^2 - 4*a*c - it is the discriminant.
Because
a=2a = 2
b=3b = -3
c=10c = 10
, then
D = b^2 - 4 * a * c = 

(-3)^2 - 4 * (2) * (10) = -71

Because D<0, then the equation
has no real roots,
but complex roots is exists.
x1 = (-b + sqrt(D)) / (2*a)

x2 = (-b - sqrt(D)) / (2*a)

or
x1=34+71i4x_{1} = \frac{3}{4} + \frac{\sqrt{71} i}{4}
x2=3471i4x_{2} = \frac{3}{4} - \frac{\sqrt{71} i}{4}
x1=34+71i4x_{1} = \frac{3}{4} + \frac{\sqrt{71} i}{4}
x2=3471i4x_{2} = \frac{3}{4} - \frac{\sqrt{71} i}{4}
Exclude the complex solutions:
This equation has no roots,
this inequality is executed for any x value or has no solutions
check it
subtitute random point x, for example
x0 = 0

(20203)+10<0\left(2 \cdot 0^{2} - 0 \cdot 3\right) + 10 < 0
10 < 0

but
10 > 0

so the inequality has no solutions
Solving inequality on a graph
-5.0-4.0-3.0-2.0-1.05.00.01.02.03.04.0020
Rapid solution
This inequality has no solutions