4x^2-25x+20=0

Simple and best practice solution for 4x^2-25x+20=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 4x^2-25x+20=0 equation:


Simplifying
4x2 + -25x + 20 = 0

Reorder the terms:
20 + -25x + 4x2 = 0

Solving
20 + -25x + 4x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
5 + -6.25x + x2 = 0

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -6.25x + -5 + x2 = 0 + -5

Reorder the terms:
5 + -5 + -6.25x + x2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -6.25x + x2 = 0 + -5
-6.25x + x2 = 0 + -5

Combine like terms: 0 + -5 = -5
-6.25x + x2 = -5

The x term is -6.25x.  Take half its coefficient (-3.125).
Square it (9.765625) and add it to both sides.

Add '9.765625' to each side of the equation.
-6.25x + 9.765625 + x2 = -5 + 9.765625

Reorder the terms:
9.765625 + -6.25x + x2 = -5 + 9.765625

Combine like terms: -5 + 9.765625 = 4.765625
9.765625 + -6.25x + x2 = 4.765625

Factor a perfect square on the left side:
(x + -3.125)(x + -3.125) = 4.765625

Calculate the square root of the right side: 2.18303115

Break this problem into two subproblems by setting 
(x + -3.125) equal to 2.18303115 and -2.18303115.

Subproblem 1

x + -3.125 = 2.18303115 Simplifying x + -3.125 = 2.18303115 Reorder the terms: -3.125 + x = 2.18303115 Solving -3.125 + x = 2.18303115 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.125' to each side of the equation. -3.125 + 3.125 + x = 2.18303115 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + x = 2.18303115 + 3.125 x = 2.18303115 + 3.125 Combine like terms: 2.18303115 + 3.125 = 5.30803115 x = 5.30803115 Simplifying x = 5.30803115

Subproblem 2

x + -3.125 = -2.18303115 Simplifying x + -3.125 = -2.18303115 Reorder the terms: -3.125 + x = -2.18303115 Solving -3.125 + x = -2.18303115 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.125' to each side of the equation. -3.125 + 3.125 + x = -2.18303115 + 3.125 Combine like terms: -3.125 + 3.125 = 0.000 0.000 + x = -2.18303115 + 3.125 x = -2.18303115 + 3.125 Combine like terms: -2.18303115 + 3.125 = 0.94196885 x = 0.94196885 Simplifying x = 0.94196885

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.30803115, 0.94196885}

See similar equations:

| 12a-5=25-3a | | x+8y=-31 | | (x-1)+ln(x+2)=ln(6x-8) | | 6x^2-5x^2+x=0 | | 0.083=(0.39*x)+(0.5*0.045*y)+(0.5*0.045*y)+(0.3*y) | | (2x+y)=(x+5y) | | bx+3=2b-4x+2 | | (x+y)=(x+5y) | | 4(x+7)=3-x | | 4x^3-2y+3xy^2=2x | | =(k-1)x^2-3x+5k | | 5a+4a=56 | | 3cos^3x-4cosx+1=0 | | 3f+3=19 | | 4a+5=2a-19 | | t(t-6)(3t-11)=0 | | 4x^2+1-4x^2-6=2*(9x-4) | | 5n+4=32+n | | 4x^2-4x^2=18x^2+13 | | x=2+4*2 | | x=2+3.5 | | 4c+3y=48 | | 48=4x+3y | | 8e+9=73 | | 15x+75=y | | 10y+5=11y-1 | | -5*-4*2.1*-z= | | 5p(3+y)= | | 20-5y=0 | | 1045=7b+4a | | 1-x/3=5x/4+1 | | 16w^2-80=0 |

Equations solver categories