.5x(x+1)=12

Simple and best practice solution for .5x(x+1)=12 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(x+1)=12 equation:


Simplifying
0.5x(x + 1) = 12

Reorder the terms:
0.5x(1 + x) = 12
(1 * 0.5x + x * 0.5x) = 12
(0.5x + 0.5x2) = 12

Solving
0.5x + 0.5x2 = 12

Solving for variable 'x'.

Reorder the terms:
-12 + 0.5x + 0.5x2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + 0.5x + 0.5x2 = 0

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

Divide each side by '0.5'.
-24 + x + x2 = 0

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + x + 24 + x2 = 0 + 24

Reorder the terms:
-24 + 24 + x + x2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + x + x2 = 0 + 24
x + x2 = 0 + 24

Combine like terms: 0 + 24 = 24
x + x2 = 24

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.
 + 0.25 + x2 = 24 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 24 + 0.25

Combine like terms: 24 + 0.25 = 24.25
1.25 + x2 = 24.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 24.25

Calculate the square root of the right side: 4.924428901

Break this problem into two subproblems by setting 
(x + 0.5) equal to 4.924428901 and -4.924428901.

Subproblem 1

x + 0.5 = 4.924428901 Simplifying x + 0.5 = 4.924428901 Reorder the terms: 0.5 + x = 4.924428901 Solving 0.5 + x = 4.924428901 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 = 4.924428901 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 4.924428901 + -0.5 x = 4.924428901 + -0.5 Combine like terms: 4.924428901 + -0.5 = 4.424428901 x = 4.424428901 Simplifying x = 4.424428901

Subproblem 2

x + 0.5 = -4.924428901 Simplifying x + 0.5 = -4.924428901 Reorder the terms: 0.5 + x = -4.924428901 Solving 0.5 + x = -4.924428901 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 = -4.924428901 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -4.924428901 + -0.5 x = -4.924428901 + -0.5 Combine like terms: -4.924428901 + -0.5 = -5.424428901 x = -5.424428901 Simplifying x = -5.424428901

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.424428901, -5.424428901}

See similar equations:

| k*x*-8x+4=0 | | 10c+4c=-14 | | 2h+4=-2(4h-12) | | 4y+7=3x-8 | | 356+56=-832 | | 4t^4-64= | | 7u=-19+8u | | 8x=1/15 | | 9y^2-4x^2-9=0 | | 6b=-16+8b | | 5x-2=9+1 | | 5n+n=72 | | 15/100=x/16 | | 15j+20=13j-16 | | 8q=-13+7q | | -29=-8+6(r+9) | | 3-18j-4j=-9-19j | | 7n^3+19n^2+10n=0 | | 2j-k+81=6 | | 7log(x-5)=11 | | 11-(7+3)= | | 0=15-16x^2 | | 6b^2+57b+126=0 | | 3a+5a=26 | | -3x+8+7x=28 | | 3=-4x+3x | | 5-.5x=6.25x+2 | | 3=33w+-16 | | -4w+8=-5w | | 4x-4=3x-3.4 | | -10+y=-9y | | -2j+2=6-6j |

Equations solver categories