.25*x^2-.5*x-1=0

Simple and best practice solution for .25*x^2-.5*x-1=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 .25*x^2-.5*x-1=0 equation:


Simplifying
0.25x2 + -0.5x + -1 = 0

Reorder the terms:
-1 + -0.5x + 0.25x2 = 0

Solving
-1 + -0.5x + 0.25x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.25'.
-4 + -2x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -2x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + -2x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -2x + x2 = 0 + 4
-2x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
-2x + x2 = 4

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 4 + 1

Reorder the terms:
1 + -2x + x2 = 4 + 1

Combine like terms: 4 + 1 = 5
1 + -2x + x2 = 5

Factor a perfect square on the left side:
(x + -1)(x + -1) = 5

Calculate the square root of the right side: 2.236067978

Break this problem into two subproblems by setting 
(x + -1) equal to 2.236067978 and -2.236067978.

Subproblem 1

x + -1 = 2.236067978 Simplifying x + -1 = 2.236067978 Reorder the terms: -1 + x = 2.236067978 Solving -1 + x = 2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 2.236067978 + 1 Combine like terms: -1 + 1 = 0 0 + x = 2.236067978 + 1 x = 2.236067978 + 1 Combine like terms: 2.236067978 + 1 = 3.236067978 x = 3.236067978 Simplifying x = 3.236067978

Subproblem 2

x + -1 = -2.236067978 Simplifying x + -1 = -2.236067978 Reorder the terms: -1 + x = -2.236067978 Solving -1 + x = -2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -2.236067978 + 1 Combine like terms: -1 + 1 = 0 0 + x = -2.236067978 + 1 x = -2.236067978 + 1 Combine like terms: -2.236067978 + 1 = -1.236067978 x = -1.236067978 Simplifying x = -1.236067978

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.236067978, -1.236067978}

See similar equations:

| 4n-6=6 | | 4*8= | | 1+5v+v-6= | | -20x-4x=10-10x | | 79+(5x+4)=180 | | 18+d=7d+6 | | -9=-63 | | 2a+7=3 | | 60+x=90 | | 3y-4=0 | | 3X^2+2X-26=0 | | -4=4t-4 | | 2a-14=-22 | | (5x+4)+79=180 | | 20=-12x+15 | | (4x+1)+(1+4x)=90 | | 13x+5-2x-3= | | 2Y+37=23+7Y | | 113x+5-2x-3x= | | 9x+3=7x-8x+12 | | 4x+20=14x-60 | | (2x+8)+(5x+4)=180 | | 13x+25y=291 | | 13x+25y=292 | | 2x^2-14x=-2x^2-5x-2 | | 3n=9-2n | | 8z+3+2z=-17 | | (3x+1)+(x-29)=180 | | a^3+b^3=(a+b)(a^2-b+b^2) | | 2x^2+4x-6=24-3x | | 4=2t-4 | | -28x^2+76x-40=0 |

Equations solver categories