x+12(x)(x)-5=31

Simple and best practice solution for x+12(x)(x)-5=31 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+12(x)(x)-5=31 equation:


Simplifying
x + 12(x)(x) + -5 = 31

Multiply x * x
x + 12x2 + -5 = 31

Reorder the terms:
-5 + x + 12x2 = 31

Solving
-5 + x + 12x2 = 31

Solving for variable 'x'.

Reorder the terms:
-5 + -31 + x + 12x2 = 31 + -31

Combine like terms: -5 + -31 = -36
-36 + x + 12x2 = 31 + -31

Combine like terms: 31 + -31 = 0
-36 + x + 12x2 = 0

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

Divide each side by '12'.
-3 + 0.08333333333x + x2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 0.08333333333x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + 0.08333333333x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 0.08333333333x + x2 = 0 + 3
0.08333333333x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
0.08333333333x + x2 = 3

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.
0.08333333333x + 0.25 + x2 = 3 + 0.25

Reorder the terms:
0.25 + 0.08333333333x + x2 = 3 + 0.25

Combine like terms: 3 + 0.25 = 3.25
0.25 + 0.08333333333x + x2 = 3.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 3.25

Calculate the square root of the right side: 1.802775638

Break this problem into two subproblems by setting 
(x + 0.5) equal to 1.802775638 and -1.802775638.

Subproblem 1

x + 0.5 = 1.802775638 Simplifying x + 0.5 = 1.802775638 Reorder the terms: 0.5 + x = 1.802775638 Solving 0.5 + x = 1.802775638 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 = 1.802775638 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.802775638 + -0.5 x = 1.802775638 + -0.5 Combine like terms: 1.802775638 + -0.5 = 1.302775638 x = 1.302775638 Simplifying x = 1.302775638

Subproblem 2

x + 0.5 = -1.802775638 Simplifying x + 0.5 = -1.802775638 Reorder the terms: 0.5 + x = -1.802775638 Solving 0.5 + x = -1.802775638 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 = -1.802775638 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.802775638 + -0.5 x = -1.802775638 + -0.5 Combine like terms: -1.802775638 + -0.5 = -2.302775638 x = -2.302775638 Simplifying x = -2.302775638

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.302775638, -2.302775638}

See similar equations:

| -x^3-0.5x^2+x=0.5 | | 4(6z-1)-5(z+8)=6(z+1) | | (w+1)(w-1)=15 | | 4x-6=(x+1)2 | | 6x-6=(x+3)2 | | 9x^2=-5x+1 | | =4x^5-2x^3-4x^5+100x-7 | | 12x+5y+7y+3x= | | 12-4n=-2n-16 | | x+3x(x)=(x)(x)+24 | | 5p+15(1-p)=10+(-10)(1-p) | | 11h-8-9h=-6 | | 8y^2=2y+1 | | -5p+15(1-p)=-10p+10(1-p) | | 5n+16=3n | | 5f-5t=-4500 | | -5b+4a-4a-9b= | | x(5)+x(6)=55 | | X-24=62 | | w^2-5w+7=0 | | -2p+3(1-p)=2p+(-1)(1-p) | | Q=U+Urt | | 2x+3y+2z=147 | | 2p+(-2)(1-p)=-3p+1(1-p) | | x+x+y+y+y+z+z=147 | | 2p+-3(1-p)=-2p+1(1-p) | | 5x-3=2y+9 | | v(5+v)(v-9)=0 | | -2(3x+1)=2 | | -8+3r=6r-4r | | -6-7n=6-n | | 3-4(-5x+4)=20x+13 |

Equations solver categories