3x^2-9x+4=

Simple and best practice solution for 3x^2-9x+4= 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 3x^2-9x+4= equation:


Simplifying
3x2 + -9x + 4 = 0

Reorder the terms:
4 + -9x + 3x2 = 0

Solving
4 + -9x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
1.333333333 + -3x + x2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + -3x + -1.333333333 + x2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + -3x + x2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + -3x + x2 = 0 + -1.333333333
-3x + x2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
-3x + x2 = -1.333333333

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 = -1.333333333 + 2.25

Reorder the terms:
2.25 + -3x + x2 = -1.333333333 + 2.25

Combine like terms: -1.333333333 + 2.25 = 0.916666667
2.25 + -3x + x2 = 0.916666667

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 0.916666667

Calculate the square root of the right side: 0.957427108

Break this problem into two subproblems by setting 
(x + -1.5) equal to 0.957427108 and -0.957427108.

Subproblem 1

x + -1.5 = 0.957427108 Simplifying x + -1.5 = 0.957427108 Reorder the terms: -1.5 + x = 0.957427108 Solving -1.5 + x = 0.957427108 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 = 0.957427108 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 0.957427108 + 1.5 x = 0.957427108 + 1.5 Combine like terms: 0.957427108 + 1.5 = 2.457427108 x = 2.457427108 Simplifying x = 2.457427108

Subproblem 2

x + -1.5 = -0.957427108 Simplifying x + -1.5 = -0.957427108 Reorder the terms: -1.5 + x = -0.957427108 Solving -1.5 + x = -0.957427108 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 = -0.957427108 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -0.957427108 + 1.5 x = -0.957427108 + 1.5 Combine like terms: -0.957427108 + 1.5 = 0.542572892 x = 0.542572892 Simplifying x = 0.542572892

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.457427108, 0.542572892}

See similar equations:

| (16x^4)-(8x^2)+(16x)+64=0 | | 3y=5x-30 | | 7x+3=23-3x | | y=-4-6x-2x^2 | | 12x+5x^2-3=x-5 | | -20=-3+4x | | w/-3-6 | | 3(y+4)=7 | | 2x-16=-34 | | 5x^2-17z+14= | | 4x^2+6x(-2x+4x)=0 | | tan40°(45/x) | | 5a-4=32 | | -30=-4x+6 | | a^6+6=10 | | 9/10t=-9 | | -4x=-4x^2+3 | | 7x+7y=6 | | 1=x/2-4 | | 4/7y=-12 | | 9/8(8/9s) | | (a+8)(a-7)=0 | | log[2](7x+7)=4 | | y=5/3x-10 | | 1x+10x+25(17-x)=230 | | P/2=p-2/8 | | 6m-45=15 | | 180=3x-14+2x+28 | | 4(n-12)=24 | | 13+26=3a | | 5x=2(x+93) | | P/2=p-2:8 |

Equations solver categories