x=5x^2-40x-27

Simple and best practice solution for x=5x^2-40x-27 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=5x^2-40x-27 equation:


Simplifying
x = 5x2 + -40x + -27

Reorder the terms:
x = -27 + -40x + 5x2

Solving
x = -27 + -40x + 5x2

Solving for variable 'x'.

Reorder the terms:
27 + x + 40x + -5x2 = -27 + -40x + 5x2 + 27 + 40x + -5x2

Combine like terms: x + 40x = 41x
27 + 41x + -5x2 = -27 + -40x + 5x2 + 27 + 40x + -5x2

Reorder the terms:
27 + 41x + -5x2 = -27 + 27 + -40x + 40x + 5x2 + -5x2

Combine like terms: -27 + 27 = 0
27 + 41x + -5x2 = 0 + -40x + 40x + 5x2 + -5x2
27 + 41x + -5x2 = -40x + 40x + 5x2 + -5x2

Combine like terms: -40x + 40x = 0
27 + 41x + -5x2 = 0 + 5x2 + -5x2
27 + 41x + -5x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
27 + 41x + -5x2 = 0

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

Divide each side by '-5'.
-5.4 + -8.2x + x2 = 0

Move the constant term to the right:

Add '5.4' to each side of the equation.
-5.4 + -8.2x + 5.4 + x2 = 0 + 5.4

Reorder the terms:
-5.4 + 5.4 + -8.2x + x2 = 0 + 5.4

Combine like terms: -5.4 + 5.4 = 0.0
0.0 + -8.2x + x2 = 0 + 5.4
-8.2x + x2 = 0 + 5.4

Combine like terms: 0 + 5.4 = 5.4
-8.2x + x2 = 5.4

The x term is -8.2x.  Take half its coefficient (-4.1).
Square it (16.81) and add it to both sides.

Add '16.81' to each side of the equation.
-8.2x + 16.81 + x2 = 5.4 + 16.81

Reorder the terms:
16.81 + -8.2x + x2 = 5.4 + 16.81

Combine like terms: 5.4 + 16.81 = 22.21
16.81 + -8.2x + x2 = 22.21

Factor a perfect square on the left side:
(x + -4.1)(x + -4.1) = 22.21

Calculate the square root of the right side: 4.712748667

Break this problem into two subproblems by setting 
(x + -4.1) equal to 4.712748667 and -4.712748667.

Subproblem 1

x + -4.1 = 4.712748667 Simplifying x + -4.1 = 4.712748667 Reorder the terms: -4.1 + x = 4.712748667 Solving -4.1 + x = 4.712748667 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.1' to each side of the equation. -4.1 + 4.1 + x = 4.712748667 + 4.1 Combine like terms: -4.1 + 4.1 = 0.0 0.0 + x = 4.712748667 + 4.1 x = 4.712748667 + 4.1 Combine like terms: 4.712748667 + 4.1 = 8.812748667 x = 8.812748667 Simplifying x = 8.812748667

Subproblem 2

x + -4.1 = -4.712748667 Simplifying x + -4.1 = -4.712748667 Reorder the terms: -4.1 + x = -4.712748667 Solving -4.1 + x = -4.712748667 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.1' to each side of the equation. -4.1 + 4.1 + x = -4.712748667 + 4.1 Combine like terms: -4.1 + 4.1 = 0.0 0.0 + x = -4.712748667 + 4.1 x = -4.712748667 + 4.1 Combine like terms: -4.712748667 + 4.1 = -0.612748667 x = -0.612748667 Simplifying x = -0.612748667

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.812748667, -0.612748667}

See similar equations:

| 6-x+.97x=0 | | y=5x^2-40x-27 | | x^2+0x-26=0 | | 7x+3=20+2x | | 5=-16-p | | 7-4k=-3k+7 | | -9x^2-24x-7=0 | | 14+4x-1=9 | | 6-x+.96x=0 | | 2.5x^2+3x+.5=0 | | 8-3x=-3x+16 | | 6x+4=4(x+10) | | -7r^2+140r^2-700=0 | | 3-2n=-9-4n | | 5m-5+3m=9+6m | | 5ab(4a+3ab+2b)= | | -4(3x-2)=14-2x | | 8x+9x-3x=21+7 | | 4v(v+6)(v+2)=0 | | 2x+4(3x+6)=-3+4 | | 4(y-2)=36 | | 0=-16t^2+150 | | 0=-16t^2+90 | | -7+4v=1+3v | | 20x+5=2x-5 | | -148=-8r-7(-4+2r) | | x=3.8 | | 3(-8d+20)=-14d | | 13-8r+4r=4+5r | | -13g+26=-143 | | 10x-90x-520= | | 4-(3x+2)=0.5(8x+12) |

Equations solver categories