2x^2+6x=4x+9

Simple and best practice solution for 2x^2+6x=4x+9 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 2x^2+6x=4x+9 equation:


Simplifying
2x2 + 6x = 4x + 9

Reorder the terms:
6x + 2x2 = 4x + 9

Reorder the terms:
6x + 2x2 = 9 + 4x

Solving
6x + 2x2 = 9 + 4x

Solving for variable 'x'.

Reorder the terms:
-9 + 6x + -4x + 2x2 = 9 + 4x + -9 + -4x

Combine like terms: 6x + -4x = 2x
-9 + 2x + 2x2 = 9 + 4x + -9 + -4x

Reorder the terms:
-9 + 2x + 2x2 = 9 + -9 + 4x + -4x

Combine like terms: 9 + -9 = 0
-9 + 2x + 2x2 = 0 + 4x + -4x
-9 + 2x + 2x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
-9 + 2x + 2x2 = 0

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

Divide each side by '2'.
-4.5 + x + x2 = 0

Move the constant term to the right:

Add '4.5' to each side of the equation.
-4.5 + x + 4.5 + x2 = 0 + 4.5

Reorder the terms:
-4.5 + 4.5 + x + x2 = 0 + 4.5

Combine like terms: -4.5 + 4.5 = 0.0
0.0 + x + x2 = 0 + 4.5
x + x2 = 0 + 4.5

Combine like terms: 0 + 4.5 = 4.5
x + x2 = 4.5

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.
 + 0.25 + x2 = 4.5 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 4.5 + 0.25

Combine like terms: 4.5 + 0.25 = 4.75
1.25 + x2 = 4.75

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 4.75

Calculate the square root of the right side: 2.179449472

Break this problem into two subproblems by setting 
(x + 0.5) equal to 2.179449472 and -2.179449472.

Subproblem 1

x + 0.5 = 2.179449472 Simplifying x + 0.5 = 2.179449472 Reorder the terms: 0.5 + x = 2.179449472 Solving 0.5 + x = 2.179449472 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 = 2.179449472 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 2.179449472 + -0.5 x = 2.179449472 + -0.5 Combine like terms: 2.179449472 + -0.5 = 1.679449472 x = 1.679449472 Simplifying x = 1.679449472

Subproblem 2

x + 0.5 = -2.179449472 Simplifying x + 0.5 = -2.179449472 Reorder the terms: 0.5 + x = -2.179449472 Solving 0.5 + x = -2.179449472 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 = -2.179449472 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -2.179449472 + -0.5 x = -2.179449472 + -0.5 Combine like terms: -2.179449472 + -0.5 = -2.679449472 x = -2.679449472 Simplifying x = -2.679449472

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.679449472, -2.679449472}

See similar equations:

| -6x^2+6x-48=0 | | 6(v+5)+2(v-2)=10v+4-4 | | 6(v+5)+2(v-2)=10v+4-5 | | -x+y=2 | | 5x-(2x+3)=-3 | | 3(3a+3)+6=81 | | 2x-3+4=39 | | 0.3x+5=9 | | x-(x*.17)=16994 | | 12v-2v= | | 3x+14=49-2x | | 5x-30=15 | | x-.17x=19664 | | 3+10x=84+x | | 0.7+16+4w=27.28 | | 7(n-8)=-2n+7 | | Z^2-10z=50 | | 2(8m)=3(4.50+1.50m) | | 2x+24=11x-57 | | 3x+7=-63-7x | | -108-9x=9x+18 | | 10x-34=4x+2 | | -5x+2=67 | | 6-10x=96-45x | | 2x+40=5x+14 | | 53-2x=16x+15 | | 152-6x=6x+8 | | -3x+7x=-12 | | -11+9-10=-6x+8x-15x | | -18-5x=9-8x | | 5y-10=-25 | | -40-6x=-4(x+8)-3x |

Equations solver categories