4x^2+3=12x

Simple and best practice solution for 4x^2+3=12x 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 4x^2+3=12x equation:


Simplifying
4x2 + 3 = 12x

Reorder the terms:
3 + 4x2 = 12x

Solving
3 + 4x2 = 12x

Solving for variable 'x'.

Reorder the terms:
3 + -12x + 4x2 = 12x + -12x

Combine like terms: 12x + -12x = 0
3 + -12x + 4x2 = 0

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

Divide each side by '4'.
0.75 + -3x + x2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -3x + -0.75 + x2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -3x + x2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -3x + x2 = 0 + -0.75
-3x + x2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-3x + x2 = -0.75

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = -0.75 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -0.75 + 2.25

Combine like terms: -0.75 + 2.25 = 1.5
2.25 + -3x + x2 = 1.5

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 1.5

Calculate the square root of the right side: 1.224744871

Break this problem into two subproblems by setting 
(x + -1.5) equal to 1.224744871 and -1.224744871.

Subproblem 1

x + -1.5 = 1.224744871 Simplifying x + -1.5 = 1.224744871 Reorder the terms: -1.5 + x = 1.224744871 Solving -1.5 + x = 1.224744871 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 1.224744871 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.224744871 + 1.5 x = 1.224744871 + 1.5 Combine like terms: 1.224744871 + 1.5 = 2.724744871 x = 2.724744871 Simplifying x = 2.724744871

Subproblem 2

x + -1.5 = -1.224744871 Simplifying x + -1.5 = -1.224744871 Reorder the terms: -1.5 + x = -1.224744871 Solving -1.5 + x = -1.224744871 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -1.224744871 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.224744871 + 1.5 x = -1.224744871 + 1.5 Combine like terms: -1.224744871 + 1.5 = 0.275255129 x = 0.275255129 Simplifying x = 0.275255129

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.724744871, 0.275255129}

See similar equations:

| -(7x-4)=5x-20 | | 4(2x-7)+3(x+4)= | | 2(4-5x)=3(5x+4) | | 8(n-5)=80 | | -3x+8=12+x | | 2(7k-1)=-21-5k | | 8x-13=47 | | 2+f=3f+6 | | -4(r-5)=28-8r | | -10(s+4)=-96 | | 7y-3=11y+21 | | 9x-12=12x-54 | | -11y+-8+3y=24 | | 7r-16=716 | | 2.5h=17.5 | | 7-3[5-x]=2x+4 | | 8x-6=4x-62 | | 4x(y+g)= | | 3(x+5)=2(3x+6) | | 47=54+7x-28 | | 2(n+2)=x+8 | | 120=8t | | 8(4x-7)=32 | | 6x+4-2x-10=4x-6 | | a+2=3x+2a-8 | | 6x+430=9x | | 5v+4v=54 | | 3x+4x-2-10=9x-20-2x | | 9+-4y=1 | | -2x+3-4x=-6x+21 | | U(2u+3)= | | 25x-100-16x=17 |

Equations solver categories