Mister Exam

Other calculators


3*x^2-4*x=0

3*x^2-4*x=0 equation

The teacher will be very surprised to see your correct solution 😉

v

Numerical solution:

Do search numerical solution at [, ]

The solution

You have entered [src]
   2          
3*x  - 4*x = 0
$$3 x^{2} - 4 x = 0$$
Detail solution
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:
$$x_{1} = \frac{\sqrt{D} - b}{2 a}$$
$$x_{2} = \frac{- \sqrt{D} - b}{2 a}$$
where D = b^2 - 4*a*c - it is the discriminant.
Because
$$a = 3$$
$$b = -4$$
$$c = 0$$
, then
D = b^2 - 4 * a * c = 

(-4)^2 - 4 * (3) * (0) = 16

Because D > 0, then the equation has two roots.
x1 = (-b + sqrt(D)) / (2*a)

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

or
$$x_{1} = \frac{4}{3}$$
Simplify
$$x_{2} = 0$$
Simplify
Vieta's Theorem
rewrite the equation
$$3 x^{2} - 4 x = 0$$
of
$$a x^{2} + b x + c = 0$$
as reduced quadratic equation
$$x^{2} + \frac{b x}{a} + \frac{c}{a} = 0$$
$$x^{2} - \frac{4 x}{3} = 0$$
$$p x + x^{2} + q = 0$$
where
$$p = \frac{b}{a}$$
$$p = - \frac{4}{3}$$
$$q = \frac{c}{a}$$
$$q = 0$$
Vieta Formulas
$$x_{1} + x_{2} = - p$$
$$x_{1} x_{2} = q$$
$$x_{1} + x_{2} = \frac{4}{3}$$
$$x_{1} x_{2} = 0$$
The graph
Rapid solution [src]
x1 = 0
$$x_{1} = 0$$
x2 = 4/3
$$x_{2} = \frac{4}{3}$$
Sum and product of roots [src]
sum
0 + 0 + 4/3
$$\left(0 + 0\right) + \frac{4}{3}$$
=
4/3
$$\frac{4}{3}$$
product
1*0*4/3
$$1 \cdot 0 \cdot \frac{4}{3}$$
=
0
$$0$$
0
Numerical answer [src]
x1 = 0.0
x2 = 1.33333333333333
x2 = 1.33333333333333
The graph
3*x^2-4*x=0 equation