(6x-2)*(3x+5)=9

Simple and best practice solution for (6x-2)*(3x+5)=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 (6x-2)*(3x+5)=9 equation:


Simplifying
(6x + -2)(3x + 5) = 9

Reorder the terms:
(-2 + 6x)(3x + 5) = 9

Reorder the terms:
(-2 + 6x)(5 + 3x) = 9

Multiply (-2 + 6x) * (5 + 3x)
(-2(5 + 3x) + 6x * (5 + 3x)) = 9
((5 * -2 + 3x * -2) + 6x * (5 + 3x)) = 9
((-10 + -6x) + 6x * (5 + 3x)) = 9
(-10 + -6x + (5 * 6x + 3x * 6x)) = 9
(-10 + -6x + (30x + 18x2)) = 9

Combine like terms: -6x + 30x = 24x
(-10 + 24x + 18x2) = 9

Solving
-10 + 24x + 18x2 = 9

Solving for variable 'x'.

Reorder the terms:
-10 + -9 + 24x + 18x2 = 9 + -9

Combine like terms: -10 + -9 = -19
-19 + 24x + 18x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-19 + 24x + 18x2 = 0

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

Divide each side by '18'.
-1.055555556 + 1.333333333x + x2 = 0

Move the constant term to the right:

Add '1.055555556' to each side of the equation.
-1.055555556 + 1.333333333x + 1.055555556 + x2 = 0 + 1.055555556

Reorder the terms:
-1.055555556 + 1.055555556 + 1.333333333x + x2 = 0 + 1.055555556

Combine like terms: -1.055555556 + 1.055555556 = 0.000000000
0.000000000 + 1.333333333x + x2 = 0 + 1.055555556
1.333333333x + x2 = 0 + 1.055555556

Combine like terms: 0 + 1.055555556 = 1.055555556
1.333333333x + x2 = 1.055555556

The x term is 1.333333333x.  Take half its coefficient (0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
1.333333333x + 0.4444444442 + x2 = 1.055555556 + 0.4444444442

Reorder the terms:
0.4444444442 + 1.333333333x + x2 = 1.055555556 + 0.4444444442

Combine like terms: 1.055555556 + 0.4444444442 = 1.5000000002
0.4444444442 + 1.333333333x + x2 = 1.5000000002

Factor a perfect square on the left side:
(x + 0.6666666665)(x + 0.6666666665) = 1.5000000002

Calculate the square root of the right side: 1.224744871

Break this problem into two subproblems by setting 
(x + 0.6666666665) equal to 1.224744871 and -1.224744871.

Subproblem 1

x + 0.6666666665 = 1.224744871 Simplifying x + 0.6666666665 = 1.224744871 Reorder the terms: 0.6666666665 + x = 1.224744871 Solving 0.6666666665 + x = 1.224744871 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = 1.224744871 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = 1.224744871 + -0.6666666665 x = 1.224744871 + -0.6666666665 Combine like terms: 1.224744871 + -0.6666666665 = 0.5580782045 x = 0.5580782045 Simplifying x = 0.5580782045

Subproblem 2

x + 0.6666666665 = -1.224744871 Simplifying x + 0.6666666665 = -1.224744871 Reorder the terms: 0.6666666665 + x = -1.224744871 Solving 0.6666666665 + x = -1.224744871 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6666666665' to each side of the equation. 0.6666666665 + -0.6666666665 + x = -1.224744871 + -0.6666666665 Combine like terms: 0.6666666665 + -0.6666666665 = 0.0000000000 0.0000000000 + x = -1.224744871 + -0.6666666665 x = -1.224744871 + -0.6666666665 Combine like terms: -1.224744871 + -0.6666666665 = -1.8914115375 x = -1.8914115375 Simplifying x = -1.8914115375

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5580782045, -1.8914115375}

See similar equations:

| 11-(1/5)x4 | | 0.198=LOGx^2 | | H-2M=-13 | | 329=20x/4 | | -9n+10=-8n-9 | | 3m-3=a | | -4.5+0.5y=x | | 3M=9-2N | | x+y-y=4-(-x^2+8x-10) | | 11=w+18 | | (12x+6)*(3x+5)=0 | | 3x/8(x/9)=-5 | | 2x+4x+8x-8= | | 12x-5=-27 | | 6-7x/5=-7 | | 4/7^2 | | 8c+6c= | | 3H-8M=47 | | f(x)=-x^2+10x-10 | | 155/200=x/100 | | 4M+3N=14 | | -6(-15)= | | 23/12-5/4 | | -2x-141+11x=57 | | -2(-9)(-1)= | | 21+(-26)= | | 2xy(2x-y)= | | X+115=77 | | 4(7y+3)-7= | | x-7/6-11/16 | | x^2+6x-16=2x^2+7x-(x^2-9) | | 10(3x-2)-(5x-8)= |

Equations solver categories