x^2+20x-46=-8

Simple and best practice solution for x^2+20x-46=-8 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+20x-46=-8 equation:


Simplifying
x2 + 20x + -46 = -8

Reorder the terms:
-46 + 20x + x2 = -8

Solving
-46 + 20x + x2 = -8

Solving for variable 'x'.

Reorder the terms:
-46 + 8 + 20x + x2 = -8 + 8

Combine like terms: -46 + 8 = -38
-38 + 20x + x2 = -8 + 8

Combine like terms: -8 + 8 = 0
-38 + 20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '38' to each side of the equation.
-38 + 20x + 38 + x2 = 0 + 38

Reorder the terms:
-38 + 38 + 20x + x2 = 0 + 38

Combine like terms: -38 + 38 = 0
0 + 20x + x2 = 0 + 38
20x + x2 = 0 + 38

Combine like terms: 0 + 38 = 38
20x + x2 = 38

The x term is 20x.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20x + 100 + x2 = 38 + 100

Reorder the terms:
100 + 20x + x2 = 38 + 100

Combine like terms: 38 + 100 = 138
100 + 20x + x2 = 138

Factor a perfect square on the left side:
(x + 10)(x + 10) = 138

Calculate the square root of the right side: 11.747340124

Break this problem into two subproblems by setting 
(x + 10) equal to 11.747340124 and -11.747340124.

Subproblem 1

x + 10 = 11.747340124 Simplifying x + 10 = 11.747340124 Reorder the terms: 10 + x = 11.747340124 Solving 10 + x = 11.747340124 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 11.747340124 + -10 Combine like terms: 10 + -10 = 0 0 + x = 11.747340124 + -10 x = 11.747340124 + -10 Combine like terms: 11.747340124 + -10 = 1.747340124 x = 1.747340124 Simplifying x = 1.747340124

Subproblem 2

x + 10 = -11.747340124 Simplifying x + 10 = -11.747340124 Reorder the terms: 10 + x = -11.747340124 Solving 10 + x = -11.747340124 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -11.747340124 + -10 Combine like terms: 10 + -10 = 0 0 + x = -11.747340124 + -10 x = -11.747340124 + -10 Combine like terms: -11.747340124 + -10 = -21.747340124 x = -21.747340124 Simplifying x = -21.747340124

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.747340124, -21.747340124}

See similar equations:

| 5x+24=14x-25 | | X-.0275X=10 | | 5+-2+(-3)= | | 2b^2+b-1=0 | | 5+-3+(-3)= | | 11a+9=4a+2 | | 8x+5+5=5x+20 | | (-5)(-5)(-5)(-5)= | | 2.1x*4y=12 | | 2.3+(-0.5)+(-1.2)+(-0.7)= | | 10-9x=110-44x | | -5+8+(-2)= | | 9x+5=9(x-8) | | 1+2x=4(x-2)-8 | | -6+(-18)= | | 9x+18=4x+73 | | 131-5x=31x+19 | | 7(x-3)+5=-16 | | x+96=88+2x | | 2x=8x-2 | | 3x+1=5x+19 | | 0.76x^2+1.4x=0 | | 2-(-9x+7)+-3=0 | | 3(d+2)+4(d-2)= | | 3(d+2)+(d-2)= | | 8x+4-10x=16 | | -x+8=-12 | | 21=5(4y-6) | | 9(w-4)=8w-6 | | 4n+7=75 | | 5x+37=15x-73 | | 2(5*x)=(12X) |

Equations solver categories