4x(x+2)=2x+9

Simple and best practice solution for 4x(x+2)=2x+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 4x(x+2)=2x+9 equation:


Simplifying
4x(x + 2) = 2x + 9

Reorder the terms:
4x(2 + x) = 2x + 9
(2 * 4x + x * 4x) = 2x + 9
(8x + 4x2) = 2x + 9

Reorder the terms:
8x + 4x2 = 9 + 2x

Solving
8x + 4x2 = 9 + 2x

Solving for variable 'x'.

Reorder the terms:
-9 + 8x + -2x + 4x2 = 9 + 2x + -9 + -2x

Combine like terms: 8x + -2x = 6x
-9 + 6x + 4x2 = 9 + 2x + -9 + -2x

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

Combine like terms: 9 + -9 = 0
-9 + 6x + 4x2 = 0 + 2x + -2x
-9 + 6x + 4x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-9 + 6x + 4x2 = 0

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

Divide each side by '4'.
-2.25 + 1.5x + x2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + 1.5x + 2.25 + x2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + 1.5x + x2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + 1.5x + x2 = 0 + 2.25
1.5x + x2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
1.5x + x2 = 2.25

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = 2.25 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 2.25 + 0.5625

Combine like terms: 2.25 + 0.5625 = 2.8125
0.5625 + 1.5x + x2 = 2.8125

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 2.8125

Calculate the square root of the right side: 1.677050983

Break this problem into two subproblems by setting 
(x + 0.75) equal to 1.677050983 and -1.677050983.

Subproblem 1

x + 0.75 = 1.677050983 Simplifying x + 0.75 = 1.677050983 Reorder the terms: 0.75 + x = 1.677050983 Solving 0.75 + x = 1.677050983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 1.677050983 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 1.677050983 + -0.75 x = 1.677050983 + -0.75 Combine like terms: 1.677050983 + -0.75 = 0.927050983 x = 0.927050983 Simplifying x = 0.927050983

Subproblem 2

x + 0.75 = -1.677050983 Simplifying x + 0.75 = -1.677050983 Reorder the terms: 0.75 + x = -1.677050983 Solving 0.75 + x = -1.677050983 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -1.677050983 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -1.677050983 + -0.75 x = -1.677050983 + -0.75 Combine like terms: -1.677050983 + -0.75 = -2.427050983 x = -2.427050983 Simplifying x = -2.427050983

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.927050983, -2.427050983}

See similar equations:

| 3+x-3=9 | | 16759554.25+2a-a=35139380.82 | | 5x/180 | | 16759554.25+a-2a=35139380.82 | | Ln(5a+4)=2.5 | | 41n/41n | | 10(n+5)=35 | | z=(c^2-1)/c | | 8-7y/5=78 | | .45-9=.9m | | 2(x+4)=84 | | f(x)=-5(x-9)square-4 | | 16759554.25+a+2a=35139380.82 | | 9b-39=5b-/3 | | 3t-7=83 | | 2n*n-7n-15=0 | | 3x^2+20=2 | | x=5x+22 | | 2z-3=15 | | x^2n-1=0 | | Y-2wheny=18 | | 805=17h | | y=-5x-24 | | 8/3-3*7 | | 25q=78 | | 6x^2-3=2x | | x-.2965x=50000 | | 300=x+0.44x | | T-25=120 | | 39=-5x-4x-6 | | 35139380.82+a-2a=15827472.7 | | 4h+8=72 |

Equations solver categories