25x^2-20x-8=0

Simple and best practice solution for 25x^2-20x-8=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 25x^2-20x-8=0 equation:


Simplifying
25x2 + -20x + -8 = 0

Reorder the terms:
-8 + -20x + 25x2 = 0

Solving
-8 + -20x + 25x2 = 0

Solving for variable 'x'.

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

Divide each side by '25'.
-0.32 + -0.8x + x2 = 0

Move the constant term to the right:

Add '0.32' to each side of the equation.
-0.32 + -0.8x + 0.32 + x2 = 0 + 0.32

Reorder the terms:
-0.32 + 0.32 + -0.8x + x2 = 0 + 0.32

Combine like terms: -0.32 + 0.32 = 0.00
0.00 + -0.8x + x2 = 0 + 0.32
-0.8x + x2 = 0 + 0.32

Combine like terms: 0 + 0.32 = 0.32
-0.8x + x2 = 0.32

The x term is -0.8x.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8x + 0.16 + x2 = 0.32 + 0.16

Reorder the terms:
0.16 + -0.8x + x2 = 0.32 + 0.16

Combine like terms: 0.32 + 0.16 = 0.48
0.16 + -0.8x + x2 = 0.48

Factor a perfect square on the left side:
(x + -0.4)(x + -0.4) = 0.48

Calculate the square root of the right side: 0.692820323

Break this problem into two subproblems by setting 
(x + -0.4) equal to 0.692820323 and -0.692820323.

Subproblem 1

x + -0.4 = 0.692820323 Simplifying x + -0.4 = 0.692820323 Reorder the terms: -0.4 + x = 0.692820323 Solving -0.4 + x = 0.692820323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = 0.692820323 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = 0.692820323 + 0.4 x = 0.692820323 + 0.4 Combine like terms: 0.692820323 + 0.4 = 1.092820323 x = 1.092820323 Simplifying x = 1.092820323

Subproblem 2

x + -0.4 = -0.692820323 Simplifying x + -0.4 = -0.692820323 Reorder the terms: -0.4 + x = -0.692820323 Solving -0.4 + x = -0.692820323 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = -0.692820323 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = -0.692820323 + 0.4 x = -0.692820323 + 0.4 Combine like terms: -0.692820323 + 0.4 = -0.292820323 x = -0.292820323 Simplifying x = -0.292820323

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.092820323, -0.292820323}

See similar equations:

| 14-x=3*(x-2) | | 14-X=3x(X+2) | | 5x-c=3(x+2c)+2 | | 9x+12=0 | | 20+3x=-x | | 2x-(516-5x)=5(28x-15) | | x^3-7x+6=0 | | z^9+z^6+5z^3+5=0 | | 5x-5+2x=9 | | 3(m-1)=2m-1 | | 4x-14=34 | | 18x^3+4x^2-6x^4= | | 3x^2-4x=5 | | 2x^3+3x-x^2=6 | | 8(x-9)=-37 | | 55=3x+10 | | p=64d+2112 | | 8(3n+1)=4(6n+2) | | 6(2z-1)-4(z+2)=3(z+1) | | 4a*2b*5a*2b= | | 9a+7=4a-33 | | x^7+10x^6-24x^5= | | 70.81+0.189x=80.2 | | 0.25(p+2)=12 | | 14x=2y | | y=0.189x+80.2 | | 2x^2-21x+54=0 | | (8+v)(5v-3)=0 | | x-1.6=.45x | | 5xy+10y=0 | | 10+(5-7x)=31-3x | | 1-(x-2)=3x+1 |

Equations solver categories