x(x+1)=16

Simple and best practice solution for x(x+1)=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(x+1)=16 equation:


Simplifying
x(x + 1) = 16

Reorder the terms:
x(1 + x) = 16
(1 * x + x * x) = 16
(1x + x2) = 16

Solving
1x + x2 = 16

Solving for variable 'x'.

Reorder the terms:
-16 + 1x + x2 = 16 + -16

Combine like terms: 16 + -16 = 0
-16 + 1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '16' to each side of the equation.
-16 + 1x + 16 + x2 = 0 + 16

Reorder the terms:
-16 + 16 + 1x + x2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 1x + x2 = 0 + 16
1x + x2 = 0 + 16

Combine like terms: 0 + 16 = 16
1x + x2 = 16

The x term is 1x.  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.
x + 0.25 + x2 = 16 + 0.25

Reorder the terms:
0.25 + x + x2 = 16 + 0.25

Combine like terms: 16 + 0.25 = 16.25
0.25 + x + x2 = 16.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 16.25

Calculate the square root of the right side: 4.031128874

Break this problem into two subproblems by setting 
(x + 0.5) equal to 4.031128874 and -4.031128874.

Subproblem 1

x + 0.5 = 4.031128874 Simplifying x + 0.5 = 4.031128874 Reorder the terms: 0.5 + x = 4.031128874 Solving 0.5 + x = 4.031128874 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 = 4.031128874 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 4.031128874 + -0.5 x = 4.031128874 + -0.5 Combine like terms: 4.031128874 + -0.5 = 3.531128874 x = 3.531128874 Simplifying x = 3.531128874

Subproblem 2

x + 0.5 = -4.031128874 Simplifying x + 0.5 = -4.031128874 Reorder the terms: 0.5 + x = -4.031128874 Solving 0.5 + x = -4.031128874 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 = -4.031128874 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -4.031128874 + -0.5 x = -4.031128874 + -0.5 Combine like terms: -4.031128874 + -0.5 = -4.531128874 x = -4.531128874 Simplifying x = -4.531128874

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.531128874, -4.531128874}

See similar equations:

| 43x+3=45x-3 | | 23x+3=22x+7 | | 9x+1=-8 | | 4p^2-3p=6 | | 5x-5=6x-6 | | 8(7x-2)=9 | | 8(v^2)-6v+1=0 | | 11x-12=10x | | 5(p-6)+9= | | 2x+20+x=180 | | 4p^2-3whenp=6 | | 3(b-5)=4(b+2) | | 8x-10=10x-10 | | 2v-8.2=17.4 | | 9x+5=10x-5 | | -2-5[7+3(x-2)]+4x=2(5x+7)-18 | | 2m+5=5m-35-2m | | z^2-(3-2i)z-1-3i=0 | | -13n=260 | | 5r^3+15r^2-125r-375= | | V=0.95h^3 | | (190+-s)+s=190 | | 1-169x^2= | | -84=-5(3n+1)-4 | | 12x^2+113x+45=0 | | K+s=190 | | (5x-48)=(3x-8) | | 2v=5.12 | | 9x^2+95x+50=0 | | (19+-0.9s)+9s=190 | | 2x-5+x=13 | | 14x^2-17x+5=0 |

Equations solver categories