-1x^2+2x+5=0

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


Simplifying
-1x2 + 2x + 5 = 0

Reorder the terms:
5 + 2x + -1x2 = 0

Solving
5 + 2x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-5 + -2x + x2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -2x + 5 + x2 = 0 + 5

Reorder the terms:
-5 + 5 + -2x + x2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -2x + x2 = 0 + 5
-2x + x2 = 0 + 5

Combine like terms: 0 + 5 = 5
-2x + x2 = 5

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 = 5 + 1

Reorder the terms:
1 + -2x + x2 = 5 + 1

Combine like terms: 5 + 1 = 6
1 + -2x + x2 = 6

Factor a perfect square on the left side:
(x + -1)(x + -1) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(x + -1) equal to 2.449489743 and -2.449489743.

Subproblem 1

x + -1 = 2.449489743 Simplifying x + -1 = 2.449489743 Reorder the terms: -1 + x = 2.449489743 Solving -1 + x = 2.449489743 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 = 2.449489743 + 1 Combine like terms: -1 + 1 = 0 0 + x = 2.449489743 + 1 x = 2.449489743 + 1 Combine like terms: 2.449489743 + 1 = 3.449489743 x = 3.449489743 Simplifying x = 3.449489743

Subproblem 2

x + -1 = -2.449489743 Simplifying x + -1 = -2.449489743 Reorder the terms: -1 + x = -2.449489743 Solving -1 + x = -2.449489743 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 = -2.449489743 + 1 Combine like terms: -1 + 1 = 0 0 + x = -2.449489743 + 1 x = -2.449489743 + 1 Combine like terms: -2.449489743 + 1 = -1.449489743 x = -1.449489743 Simplifying x = -1.449489743

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.449489743, -1.449489743}

See similar equations:

| 5a+2b-5y=100 | | 1.3=7.8 | | 3x-5(x-2)=-4+2x-10 | | p^3+p^2+p+1=0 | | q^2+5q=90 | | X^3-1-7=0 | | 5+55x=33x+23 | | 6x+1=8.9 | | 6(x-9)=21.83 | | (x^2-2xy)dx+xdy=0 | | x-8y^2+2xy^2-4=0 | | -2.5=p+7.7 | | 3y-5+7=8 | | 7w-3w+2w=-3w+40-w | | 22y=-2y-96 | | 2x+1-4x=11 | | -1+31=-7-7a-8-2a | | 2x-3=6x-3-4x | | 10t^2=13t-4 | | b+15=3 | | -8x-16=-16 | | 2h=-1.46 | | (3x-20)= | | 6d^2=20-7d | | x=4x-10(-2) | | 5(1+6d)=-33 | | 6(3-3t)-1=5 | | 9x=5x+x+3x | | 11v=-121 | | 24k+132=24k+132 | | -5x+3+8x+10=-5+30 | | x^6-25x^8=0 |

Equations solver categories