x=8x^2+-16

Simple and best practice solution for x=8x^2+-16 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=8x^2+-16 equation:


Simplifying
x = 8x2 + -16

Reorder the terms:
x = -16 + 8x2

Solving
x = -16 + 8x2

Solving for variable 'x'.

Reorder the terms:
16 + x + -8x2 = -16 + 8x2 + 16 + -8x2

Reorder the terms:
16 + x + -8x2 = -16 + 16 + 8x2 + -8x2

Combine like terms: -16 + 16 = 0
16 + x + -8x2 = 0 + 8x2 + -8x2
16 + x + -8x2 = 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
16 + x + -8x2 = 0

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
-2 + -0.125x + x2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -0.125x + 2 + x2 = 0 + 2

Reorder the terms:
-2 + 2 + -0.125x + x2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -0.125x + x2 = 0 + 2
-0.125x + x2 = 0 + 2

Combine like terms: 0 + 2 = 2
-0.125x + x2 = 2

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.
-0.125x + 0.25 + x2 = 2 + 0.25

Reorder the terms:
0.25 + -0.125x + x2 = 2 + 0.25

Combine like terms: 2 + 0.25 = 2.25
0.25 + -0.125x + x2 = 2.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 2.25

Calculate the square root of the right side: 1.5

Break this problem into two subproblems by setting 
(x + 0.5) equal to 1.5 and -1.5.

Subproblem 1

x + 0.5 = 1.5 Simplifying x + 0.5 = 1.5 Reorder the terms: 0.5 + x = 1.5 Solving 0.5 + x = 1.5 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 = 1.5 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.5 + -0.5 x = 1.5 + -0.5 Combine like terms: 1.5 + -0.5 = 1 x = 1 Simplifying x = 1

Subproblem 2

x + 0.5 = -1.5 Simplifying x + 0.5 = -1.5 Reorder the terms: 0.5 + x = -1.5 Solving 0.5 + x = -1.5 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 = -1.5 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.5 + -0.5 x = -1.5 + -0.5 Combine like terms: -1.5 + -0.5 = -2 x = -2 Simplifying x = -2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1, -2}

See similar equations:

| f(x)=8x^2-16 | | 3xy+2x-6y=9 | | ln(10/(7-x))=lnx | | 24y-10=345-1y | | -13=11-2m | | (1/2)x^2-x-4=0 | | m/2-45/2-m/5 | | y^3-8y^2+15=0 | | 60-36y-252=20y+2 | | 2y^2-35-7y=y^2-2 | | 3x/3=3 | | 5x+8y=53 | | 30=x(3/4) | | 2xy+6x=8xy | | 2xy+6x= | | 30=x(.75) | | x(.75)=30 | | ydx=(2x+y^4)dy | | X^-1/2=1/16 | | 10x+3y=69 | | Tn=4-1 | | 4(-4(5x+5)+5(5x-5))= | | 2a+5c=10B | | x+x+10+x+30+x+20=360 | | 0=10x^2+66x+36 | | 21t-64=21t+26 | | x+x+10+x+30x+20=360 | | 8x+3x=31 | | -12x+y=225 | | -12+y=225 | | 2x+4x+4x+2x=360 | | Y=-3x^2+6x-11 |

Equations solver categories