15x^2-17x=8

Simple and best practice solution for 15x^2-17x=8 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 15x^2-17x=8 equation:


Simplifying
15x2 + -17x = 8

Reorder the terms:
-17x + 15x2 = 8

Solving
-17x + 15x2 = 8

Solving for variable 'x'.

Reorder the terms:
-8 + -17x + 15x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-8 + -17x + 15x2 = 0

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

Divide each side by '15'.
-0.5333333333 + -1.133333333x + x2 = 0

Move the constant term to the right:

Add '0.5333333333' to each side of the equation.
-0.5333333333 + -1.133333333x + 0.5333333333 + x2 = 0 + 0.5333333333

Reorder the terms:
-0.5333333333 + 0.5333333333 + -1.133333333x + x2 = 0 + 0.5333333333

Combine like terms: -0.5333333333 + 0.5333333333 = 0.0000000000
0.0000000000 + -1.133333333x + x2 = 0 + 0.5333333333
-1.133333333x + x2 = 0 + 0.5333333333

Combine like terms: 0 + 0.5333333333 = 0.5333333333
-1.133333333x + x2 = 0.5333333333

The x term is -1.133333333x.  Take half its coefficient (-0.5666666665).
Square it (0.3211111109) and add it to both sides.

Add '0.3211111109' to each side of the equation.
-1.133333333x + 0.3211111109 + x2 = 0.5333333333 + 0.3211111109

Reorder the terms:
0.3211111109 + -1.133333333x + x2 = 0.5333333333 + 0.3211111109

Combine like terms: 0.5333333333 + 0.3211111109 = 0.8544444442
0.3211111109 + -1.133333333x + x2 = 0.8544444442

Factor a perfect square on the left side:
(x + -0.5666666665)(x + -0.5666666665) = 0.8544444442

Calculate the square root of the right side: 0.924361641

Break this problem into two subproblems by setting 
(x + -0.5666666665) equal to 0.924361641 and -0.924361641.

Subproblem 1

x + -0.5666666665 = 0.924361641 Simplifying x + -0.5666666665 = 0.924361641 Reorder the terms: -0.5666666665 + x = 0.924361641 Solving -0.5666666665 + x = 0.924361641 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5666666665' to each side of the equation. -0.5666666665 + 0.5666666665 + x = 0.924361641 + 0.5666666665 Combine like terms: -0.5666666665 + 0.5666666665 = 0.0000000000 0.0000000000 + x = 0.924361641 + 0.5666666665 x = 0.924361641 + 0.5666666665 Combine like terms: 0.924361641 + 0.5666666665 = 1.4910283075 x = 1.4910283075 Simplifying x = 1.4910283075

Subproblem 2

x + -0.5666666665 = -0.924361641 Simplifying x + -0.5666666665 = -0.924361641 Reorder the terms: -0.5666666665 + x = -0.924361641 Solving -0.5666666665 + x = -0.924361641 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5666666665' to each side of the equation. -0.5666666665 + 0.5666666665 + x = -0.924361641 + 0.5666666665 Combine like terms: -0.5666666665 + 0.5666666665 = 0.0000000000 0.0000000000 + x = -0.924361641 + 0.5666666665 x = -0.924361641 + 0.5666666665 Combine like terms: -0.924361641 + 0.5666666665 = -0.3576949745 x = -0.3576949745 Simplifying x = -0.3576949745

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.4910283075, -0.3576949745}

See similar equations:

| 3x^2+7x+2=0 | | c^2-12c+36= | | 9r^2-25d^2= | | -8x^6-24x^5+22x^4= | | v^2-v-6= | | 20x^2-11x-3=0 | | x^2+8x+12=0 | | 8x^2-6x-27=0 | | x^2+21x+98=0 | | 2x^2-8=0 | | 4x^2-4x-15=0 | | 5X^3-9X^2+28X+6=0 | | x^2+17x+16=0 | | 2x^2-5x-11=0 | | x^2-x-72=0 | | Y=x^2+6x-4 | | Fx=x^2+4x+7 | | 3x^2+7x=9 | | -14=-22-x^3 | | y=x^3+3x^2-4x-12 | | 2x^3=2x^2-12x-16 | | x^2-0.54*x+0.02=0 | | x^2-0.9*x+0.2=0 | | 2e^6x+3=6 | | 2x^2+6-3=0 | | ax^2+bx+c=0 | | x^6=7x^3-12 | | x^4-2x^2=3 | | 3x^2-6x=4 | | a^2-a-1=0 | | s^2+6s-3=0 | | x^2+2x-5=0 |

Equations solver categories