7x^2-25x-6=0

Simple and best practice solution for 7x^2-25x-6=0 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 7x^2-25x-6=0 equation:


Simplifying
7x2 + -25x + -6 = 0

Reorder the terms:
-6 + -25x + 7x2 = 0

Solving
-6 + -25x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-0.8571428571 + -3.571428571x + x2 = 0

Move the constant term to the right:

Add '0.8571428571' to each side of the equation.
-0.8571428571 + -3.571428571x + 0.8571428571 + x2 = 0 + 0.8571428571

Reorder the terms:
-0.8571428571 + 0.8571428571 + -3.571428571x + x2 = 0 + 0.8571428571

Combine like terms: -0.8571428571 + 0.8571428571 = 0.0000000000
0.0000000000 + -3.571428571x + x2 = 0 + 0.8571428571
-3.571428571x + x2 = 0 + 0.8571428571

Combine like terms: 0 + 0.8571428571 = 0.8571428571
-3.571428571x + x2 = 0.8571428571

The x term is -3.571428571x.  Take half its coefficient (-1.785714286).
Square it (3.188775511) and add it to both sides.

Add '3.188775511' to each side of the equation.
-3.571428571x + 3.188775511 + x2 = 0.8571428571 + 3.188775511

Reorder the terms:
3.188775511 + -3.571428571x + x2 = 0.8571428571 + 3.188775511

Combine like terms: 0.8571428571 + 3.188775511 = 4.0459183681
3.188775511 + -3.571428571x + x2 = 4.0459183681

Factor a perfect square on the left side:
(x + -1.785714286)(x + -1.785714286) = 4.0459183681

Calculate the square root of the right side: 2.011446835

Break this problem into two subproblems by setting 
(x + -1.785714286) equal to 2.011446835 and -2.011446835.

Subproblem 1

x + -1.785714286 = 2.011446835 Simplifying x + -1.785714286 = 2.011446835 Reorder the terms: -1.785714286 + x = 2.011446835 Solving -1.785714286 + x = 2.011446835 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.785714286' to each side of the equation. -1.785714286 + 1.785714286 + x = 2.011446835 + 1.785714286 Combine like terms: -1.785714286 + 1.785714286 = 0.000000000 0.000000000 + x = 2.011446835 + 1.785714286 x = 2.011446835 + 1.785714286 Combine like terms: 2.011446835 + 1.785714286 = 3.797161121 x = 3.797161121 Simplifying x = 3.797161121

Subproblem 2

x + -1.785714286 = -2.011446835 Simplifying x + -1.785714286 = -2.011446835 Reorder the terms: -1.785714286 + x = -2.011446835 Solving -1.785714286 + x = -2.011446835 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.785714286' to each side of the equation. -1.785714286 + 1.785714286 + x = -2.011446835 + 1.785714286 Combine like terms: -1.785714286 + 1.785714286 = 0.000000000 0.000000000 + x = -2.011446835 + 1.785714286 x = -2.011446835 + 1.785714286 Combine like terms: -2.011446835 + 1.785714286 = -0.225732549 x = -0.225732549 Simplifying x = -0.225732549

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.797161121, -0.225732549}

See similar equations:

| 4+2(x-6)=2(2x+4) | | 15/n=1/30 | | 48/54=n/63 | | 28/48 | | 7.4-4.8= | | x+0.5=2y | | 8m/24 | | A^2+A-12A= | | 120=50t | | 1x+5=-17 | | X^2+22x-5280= | | 4x+5=2+3.25x | | 20p+5q-5= | | -3x+5+7x=-3 | | 2x(3+5)=64 | | -6x+3(-2x+10)=162 | | 4y^2-23y+30=0 | | 9/108 | | 48x-18y=0 | | 4x+4(3x+7)=156 | | -3x+4(7x-12)=102 | | 3x-5(2x-6)=65 | | (6+3)+(10*3)= | | -4x-7(-x-5)=65 | | 45=34+w | | (18-4)+(5+3)= | | x+43=50 | | -4x-5(-3x+5)=-135 | | 26=35-x | | (1/2)*2-1= | | (1/2)*2-1 | | 2x-4(x+16)=-40 |

Equations solver categories