x-4+4x^2=0

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


Simplifying
x + -4 + 4x2 = 0

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

Solving
-4 + x + 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'.
-1 + 0.25x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 0.25x + 1 + x2 = 0 + 1

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

Combine like terms: -1 + 1 = 0
0 + 0.25x + x2 = 0 + 1
0.25x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
0.25x + x2 = 1

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.25x + 0.25 + x2 = 1 + 0.25

Reorder the terms:
0.25 + 0.25x + x2 = 1 + 0.25

Combine like terms: 1 + 0.25 = 1.25
0.25 + 0.25x + x2 = 1.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 1.25

Calculate the square root of the right side: 1.118033989

Break this problem into two subproblems by setting 
(x + 0.5) equal to 1.118033989 and -1.118033989.

Subproblem 1

x + 0.5 = 1.118033989 Simplifying x + 0.5 = 1.118033989 Reorder the terms: 0.5 + x = 1.118033989 Solving 0.5 + x = 1.118033989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 1.118033989 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.118033989 + -0.5 x = 1.118033989 + -0.5 Combine like terms: 1.118033989 + -0.5 = 0.618033989 x = 0.618033989 Simplifying x = 0.618033989

Subproblem 2

x + 0.5 = -1.118033989 Simplifying x + 0.5 = -1.118033989 Reorder the terms: 0.5 + x = -1.118033989 Solving 0.5 + x = -1.118033989 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -1.118033989 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.118033989 + -0.5 x = -1.118033989 + -0.5 Combine like terms: -1.118033989 + -0.5 = -1.618033989 x = -1.618033989 Simplifying x = -1.618033989

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.618033989, -1.618033989}

See similar equations:

| -2-6(x-3)=x-4 | | -14+6n-3+3=5n-6 | | 107=100+x+(19-x) | | 8(t-3)+4t=6(2t+2)-8 | | 5.1(x+3)=20.4 | | 3+8(2k+1)=11+16k | | 9+-3(n-5)=30 | | 18x^2-12x-17=0 | | 8x-3=3x-17 | | 7y+3=-5y-9 | | 3x-8=2(3x-76) | | 17x+5=17x-5 | | Graphy=2x+1 | | -4(3x+9)+3x=6-4(x-3) | | -4x-6y=-18 | | 2piR=x | | 3/5n-4/5=1/5n | | 4(x^3-4X)=0 | | (7rs^2)(-3r^5s^4)= | | 1900-6p=-2(10n+7) | | 6=-12(10n+7) | | 7d-6=22 | | -2v=-6-4t | | A=2x-6 | | 1x+2x=79 | | 4t-8=t-5 | | 2x=5y-108 | | -5(x+3)-(9x-4)=x-5+3 | | x-10+2x-221+0.5x+5=180 | | z(z-3)+2(z+3)=18 | | 5h+4=4h+11 | | w(20w-73)=-63 |

Equations solver categories