x^2+4*x=2

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


Simplifying
x2 + 4x = 2

Reorder the terms:
4x + x2 = 2

Solving
4x + x2 = 2

Solving for variable 'x'.

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

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

Begin completing the square.

Move the constant term to the right:

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

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

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

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

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 = 2 + 4

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

Combine like terms: 2 + 4 = 6
4 + 4x + x2 = 6

Factor a perfect square on the left side:
(x + 2)(x + 2) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(x + 2) equal to 2.449489743 and -2.449489743.

Subproblem 1

x + 2 = 2.449489743 Simplifying x + 2 = 2.449489743 Reorder the terms: 2 + x = 2.449489743 Solving 2 + x = 2.449489743 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 = 2.449489743 + -2 Combine like terms: 2 + -2 = 0 0 + x = 2.449489743 + -2 x = 2.449489743 + -2 Combine like terms: 2.449489743 + -2 = 0.449489743 x = 0.449489743 Simplifying x = 0.449489743

Subproblem 2

x + 2 = -2.449489743 Simplifying x + 2 = -2.449489743 Reorder the terms: 2 + x = -2.449489743 Solving 2 + x = -2.449489743 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 = -2.449489743 + -2 Combine like terms: 2 + -2 = 0 0 + x = -2.449489743 + -2 x = -2.449489743 + -2 Combine like terms: -2.449489743 + -2 = -4.449489743 x = -4.449489743 Simplifying x = -4.449489743

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.449489743, -4.449489743}

See similar equations:

| (65-20)x=450+20x | | 8n=-14+6n | | 5n+37=2(-7-6n) | | 1+x=3x+13 | | -4a+5b=17 | | 8x^3+20x^2-2x-5=0 | | 3x^2+9*x=0 | | B=2c+3dforc | | -7x+5=10-x+7 | | Y=x(2)-2 | | -2r-2(3x-12)=96 | | 3x^9*x=0 | | 1/2(4x-5)-3/2=2/3(4x/7) | | -4a+25-25a=17 | | 11-7x=x+3 | | h(t)=16t^2+46t+6 | | 6m-3=15+3m | | 7x+3(-2+33)=87 | | 6(11-x)=2(32x) | | 8n+6-5n=15 | | M/(-7)=2 | | 11-2(m-3)=15 | | -3(5x-9)= | | -9=-7x+2(-3c-37) | | X=2(x-2)+4 | | 2x+8-5=2x+13 | | 11(3x+8)= | | -2x+4=-2x+1 | | 6x-7y=26+2(y-3x) | | 2.4z+1.22-6.5=0.9 | | 22-2r=44-x | | 6-(k+2)=5 |

Equations solver categories