-5x^2+2x+6=0

Simple and best practice solution for -5x^2+2x+6=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 -5x^2+2x+6=0 equation:


Simplifying
-5x2 + 2x + 6 = 0

Reorder the terms:
6 + 2x + -5x2 = 0

Solving
6 + 2x + -5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-1.2 + -0.4x + x2 = 0

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + -0.4x + 1.2 + x2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + -0.4x + x2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + -0.4x + x2 = 0 + 1.2
-0.4x + x2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
-0.4x + x2 = 1.2

The x term is -0.4x.  Take half its coefficient (-0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
-0.4x + 0.04 + x2 = 1.2 + 0.04

Reorder the terms:
0.04 + -0.4x + x2 = 1.2 + 0.04

Combine like terms: 1.2 + 0.04 = 1.24
0.04 + -0.4x + x2 = 1.24

Factor a perfect square on the left side:
(x + -0.2)(x + -0.2) = 1.24

Calculate the square root of the right side: 1.113552873

Break this problem into two subproblems by setting 
(x + -0.2) equal to 1.113552873 and -1.113552873.

Subproblem 1

x + -0.2 = 1.113552873 Simplifying x + -0.2 = 1.113552873 Reorder the terms: -0.2 + x = 1.113552873 Solving -0.2 + x = 1.113552873 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + x = 1.113552873 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + x = 1.113552873 + 0.2 x = 1.113552873 + 0.2 Combine like terms: 1.113552873 + 0.2 = 1.313552873 x = 1.313552873 Simplifying x = 1.313552873

Subproblem 2

x + -0.2 = -1.113552873 Simplifying x + -0.2 = -1.113552873 Reorder the terms: -0.2 + x = -1.113552873 Solving -0.2 + x = -1.113552873 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + x = -1.113552873 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + x = -1.113552873 + 0.2 x = -1.113552873 + 0.2 Combine like terms: -1.113552873 + 0.2 = -0.913552873 x = -0.913552873 Simplifying x = -0.913552873

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.313552873, -0.913552873}

See similar equations:

| -8=.25a+9 | | -6x^2+5x+5=0 | | x^3-4x+4=19.2 | | -4y=-12x-36 | | 5x+-4x=6 | | x^4+x^3-24=0 | | -4.905x^2+1.6x+2.64=0 | | x^4+x^3+27=0 | | 2(x-3)(x-2)= | | 14=9/5X+32 | | 14=5/9X+32 | | 15+x/17+x=0.9259 | | 2y-6x=19 | | 5x+3y=2(2) | | 5*5-10y=-80 | | 4x-6y=3(1) | | 51=50+(X-40)/4 | | 50+(X-40)/4 | | 8*8-10t=-80 | | x-8=(18x)^(1/2) | | 3x+3y=18(2) | | X=7/10*(y+10) | | 4x-y=9(1) | | x^2*2+x^4-3=0 | | (13p+11)(13p-11)= | | 7(x-7)=9.1 | | 5(a+4)=37 | | 15=5c-9 | | 5e-8=7.5 | | -x^2-4x-6=0 | | 7p=32.2 | | -x^2-4x-6=y |

Equations solver categories