7x^2-6x=-1

Simple and best practice solution for 7x^2-6x=-1 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^2-6x=-1 equation:


Simplifying
7x2 + -6x = -1

Reorder the terms:
-6x + 7x2 = -1

Solving
-6x + 7x2 = -1

Solving for variable 'x'.

Reorder the terms:
1 + -6x + 7x2 = -1 + 1

Combine like terms: -1 + 1 = 0
1 + -6x + 7x2 = 0

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

Divide each side by '7'.
0.1428571429 + -0.8571428571x + x2 = 0

Move the constant term to the right:

Add '-0.1428571429' to each side of the equation.
0.1428571429 + -0.8571428571x + -0.1428571429 + x2 = 0 + -0.1428571429

Reorder the terms:
0.1428571429 + -0.1428571429 + -0.8571428571x + x2 = 0 + -0.1428571429

Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000
0.0000000000 + -0.8571428571x + x2 = 0 + -0.1428571429
-0.8571428571x + x2 = 0 + -0.1428571429

Combine like terms: 0 + -0.1428571429 = -0.1428571429
-0.8571428571x + x2 = -0.1428571429

The x term is -0.8571428571x.  Take half its coefficient (-0.4285714286).
Square it (0.1836734694) and add it to both sides.

Add '0.1836734694' to each side of the equation.
-0.8571428571x + 0.1836734694 + x2 = -0.1428571429 + 0.1836734694

Reorder the terms:
0.1836734694 + -0.8571428571x + x2 = -0.1428571429 + 0.1836734694

Combine like terms: -0.1428571429 + 0.1836734694 = 0.0408163265
0.1836734694 + -0.8571428571x + x2 = 0.0408163265

Factor a perfect square on the left side:
(x + -0.4285714286)(x + -0.4285714286) = 0.0408163265

Calculate the square root of the right side: 0.202030509

Break this problem into two subproblems by setting 
(x + -0.4285714286) equal to 0.202030509 and -0.202030509.

Subproblem 1

x + -0.4285714286 = 0.202030509 Simplifying x + -0.4285714286 = 0.202030509 Reorder the terms: -0.4285714286 + x = 0.202030509 Solving -0.4285714286 + x = 0.202030509 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4285714286' to each side of the equation. -0.4285714286 + 0.4285714286 + x = 0.202030509 + 0.4285714286 Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000 0.0000000000 + x = 0.202030509 + 0.4285714286 x = 0.202030509 + 0.4285714286 Combine like terms: 0.202030509 + 0.4285714286 = 0.6306019376 x = 0.6306019376 Simplifying x = 0.6306019376

Subproblem 2

x + -0.4285714286 = -0.202030509 Simplifying x + -0.4285714286 = -0.202030509 Reorder the terms: -0.4285714286 + x = -0.202030509 Solving -0.4285714286 + x = -0.202030509 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4285714286' to each side of the equation. -0.4285714286 + 0.4285714286 + x = -0.202030509 + 0.4285714286 Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000 0.0000000000 + x = -0.202030509 + 0.4285714286 x = -0.202030509 + 0.4285714286 Combine like terms: -0.202030509 + 0.4285714286 = 0.2265409196 x = 0.2265409196 Simplifying x = 0.2265409196

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.6306019376, 0.2265409196}

See similar equations:

| (5x+62)(3x+47)37=180 | | 4=x-7x-8 | | 7(c-7)=6(3+c) | | 1/3(18-6x)=8-3x | | 1/3(18x-6x)=8-3x | | 2=9+w | | -2y+180=x | | 144a^2+b^2-24ab=0 | | 14+2=-2(6y-8) | | -y-3=-9 | | 3(2x+9)=-37+46 | | 3[6+(-2)]= | | b-81b^3=0 | | T(2)-10t=39 | | 2t^4-3= | | 6x-7=5(x-1)+(x-2) | | x^2+6x+9-64=0 | | X(-2)-8=0 | | -x+3+2z=0 | | X-2-8=0 | | 1/4Y-1/2Y=1/6 | | 6x-7=5(x-1)+(x+2) | | 2x^2-4x-4=2 | | (9w-2)(7w-3)=0 | | 8x-28+3x+4=108 | | Lnx=1+3lnx | | 1/4Y-1/2Y | | 4-7=-27 | | s^2-2sy-63y^2= | | (2y+3)(y-9)=0 | | 6x+4-2x=28 | | (0.0001)^-3/4 |

Equations solver categories