4x^2=9-3x

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


Simplifying
4x2 = 9 + -3x

Solving
4x2 = 9 + -3x

Solving for variable 'x'.

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

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

Combine like terms: 9 + -9 = 0
-9 + 3x + 4x2 = 0 + -3x + 3x
-9 + 3x + 4x2 = -3x + 3x

Combine like terms: -3x + 3x = 0
-9 + 3x + 4x2 = 0

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

Divide each side by '4'.
-2.25 + 0.75x + x2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + 0.75x + 2.25 + x2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + 0.75x + x2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + 0.75x + x2 = 0 + 2.25
0.75x + x2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
0.75x + x2 = 2.25

The x term is 0.75x.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75x + 0.140625 + x2 = 2.25 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = 2.25 + 0.140625

Combine like terms: 2.25 + 0.140625 = 2.390625
0.140625 + 0.75x + x2 = 2.390625

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = 2.390625

Calculate the square root of the right side: 1.54616461

Break this problem into two subproblems by setting 
(x + 0.375) equal to 1.54616461 and -1.54616461.

Subproblem 1

x + 0.375 = 1.54616461 Simplifying x + 0.375 = 1.54616461 Reorder the terms: 0.375 + x = 1.54616461 Solving 0.375 + x = 1.54616461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = 1.54616461 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = 1.54616461 + -0.375 x = 1.54616461 + -0.375 Combine like terms: 1.54616461 + -0.375 = 1.17116461 x = 1.17116461 Simplifying x = 1.17116461

Subproblem 2

x + 0.375 = -1.54616461 Simplifying x + 0.375 = -1.54616461 Reorder the terms: 0.375 + x = -1.54616461 Solving 0.375 + x = -1.54616461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = -1.54616461 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = -1.54616461 + -0.375 x = -1.54616461 + -0.375 Combine like terms: -1.54616461 + -0.375 = -1.92116461 x = -1.92116461 Simplifying x = -1.92116461

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.17116461, -1.92116461}

See similar equations:

| 7(x+3)-9=17-2x-5+9x | | 2cos(3x)+3sin(3x)=0 | | 7x-8x=1+2x | | 13x-5-9x=-9 | | 40=(12x-8) | | 3x-8=125 | | 14x^2-19x-9=0 | | 3+10x=-9+x | | N÷11/4 | | 40*1/x=6 | | 19370=x(.75) | | 3(3y)-5y=20 | | 6x+250=4x+300 | | 19370=x(.8) | | 4x+6=-50 | | X+2+3x-9+2x+1=36 | | 191=121-w | | 18370=x(.8) | | -8-(-8)+(-6)-12= | | 45-0.065= | | 0=100X-(9600+50x) | | (X^2+6x+8)(x^2+14x+48)=0 | | 6x-3=3x+12-3 | | 25n+2kg= | | 12k+3=-21 | | 4x^3-8x^2-20x=0 | | 7/x=42/6 | | x*.80=16 | | 5+10x+28-7x=36 | | x/.80=16 | | 4y-15=-8+9 | | 5*14*4=n |

Equations solver categories