-x^2+4x-1=0

Simple and best practice solution for -x^2+4x-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 -x^2+4x-1=0 equation:


Simplifying
-1x2 + 4x + -1 = 0

Reorder the terms:
-1 + 4x + -1x2 = 0

Solving
-1 + 4x + -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'.
1 + -4x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -4x + -1 + x2 = 0 + -1

Reorder the terms:
1 + -1 + -4x + x2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -4x + x2 = 0 + -1
-4x + x2 = 0 + -1

Combine like terms: 0 + -1 = -1
-4x + x2 = -1

The x term is -4x.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

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

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

Combine like terms: -1 + 4 = 3
4 + -4x + x2 = 3

Factor a perfect square on the left side:
(x + -2)(x + -2) = 3

Calculate the square root of the right side: 1.732050808

Break this problem into two subproblems by setting 
(x + -2) equal to 1.732050808 and -1.732050808.

Subproblem 1

x + -2 = 1.732050808 Simplifying x + -2 = 1.732050808 Reorder the terms: -2 + x = 1.732050808 Solving -2 + x = 1.732050808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = 1.732050808 + 2 Combine like terms: -2 + 2 = 0 0 + x = 1.732050808 + 2 x = 1.732050808 + 2 Combine like terms: 1.732050808 + 2 = 3.732050808 x = 3.732050808 Simplifying x = 3.732050808

Subproblem 2

x + -2 = -1.732050808 Simplifying x + -2 = -1.732050808 Reorder the terms: -2 + x = -1.732050808 Solving -2 + x = -1.732050808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + x = -1.732050808 + 2 Combine like terms: -2 + 2 = 0 0 + x = -1.732050808 + 2 x = -1.732050808 + 2 Combine like terms: -1.732050808 + 2 = 0.267949192 x = 0.267949192 Simplifying x = 0.267949192

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.732050808, 0.267949192}

See similar equations:

| 9x-2=10x+10 | | m-1=4m | | 3y+6y^2-9=0 | | c+12=23 | | 12x+12x^2=0 | | x^3+10x+8=0 | | c=2.28(30)+14.19 | | 8(4-7w)= | | x+2/3=3/5 | | N-14=3 | | Y-8(y+5)=13y | | 5.6=1.12y | | c=2.28(10.5)+14.19 | | 5m-25=-41+m | | 12(3-5y)= | | 5x+30x+25=0 | | 1.5+.75=.25-.5 | | 4=3r+1/7 | | -9(2x+12)= | | c=2.28(13)+14.19 | | 4.85-6.4x+1.11=25.8 | | c=2.28(12)+14.19 | | 9+t-t=4t-1 | | 33b^2-249b-120=0 | | 6.6t-5.7=-0.3+9.3t | | c=2.28(6)+14.19 | | 2.5(4q-3)=0.5 | | 4(x+2)=13 | | -6a^5+6a^4-3a^3=0 | | x-3(2x+3)=36 | | -5*-3= | | 2p-3=4(p+1)-3(7+p) |

Equations solver categories