x=7x^2+5x-5

Simple and best practice solution for x=7x^2+5x-5 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 x=7x^2+5x-5 equation:


Simplifying
x = 7x2 + 5x + -5

Reorder the terms:
x = -5 + 5x + 7x2

Solving
x = -5 + 5x + 7x2

Solving for variable 'x'.

Reorder the terms:
5 + x + -5x + -7x2 = -5 + 5x + 7x2 + 5 + -5x + -7x2

Combine like terms: x + -5x = -4x
5 + -4x + -7x2 = -5 + 5x + 7x2 + 5 + -5x + -7x2

Reorder the terms:
5 + -4x + -7x2 = -5 + 5 + 5x + -5x + 7x2 + -7x2

Combine like terms: -5 + 5 = 0
5 + -4x + -7x2 = 0 + 5x + -5x + 7x2 + -7x2
5 + -4x + -7x2 = 5x + -5x + 7x2 + -7x2

Combine like terms: 5x + -5x = 0
5 + -4x + -7x2 = 0 + 7x2 + -7x2
5 + -4x + -7x2 = 7x2 + -7x2

Combine like terms: 7x2 + -7x2 = 0
5 + -4x + -7x2 = 0

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

Divide each side by '-7'.
-0.7142857143 + 0.5714285714x + x2 = 0

Move the constant term to the right:

Add '0.7142857143' to each side of the equation.
-0.7142857143 + 0.5714285714x + 0.7142857143 + x2 = 0 + 0.7142857143

Reorder the terms:
-0.7142857143 + 0.7142857143 + 0.5714285714x + x2 = 0 + 0.7142857143

Combine like terms: -0.7142857143 + 0.7142857143 = 0.0000000000
0.0000000000 + 0.5714285714x + x2 = 0 + 0.7142857143
0.5714285714x + x2 = 0 + 0.7142857143

Combine like terms: 0 + 0.7142857143 = 0.7142857143
0.5714285714x + x2 = 0.7142857143

The x term is 0.5714285714x.  Take half its coefficient (0.2857142857).
Square it (0.08163265305) and add it to both sides.

Add '0.08163265305' to each side of the equation.
0.5714285714x + 0.08163265305 + x2 = 0.7142857143 + 0.08163265305

Reorder the terms:
0.08163265305 + 0.5714285714x + x2 = 0.7142857143 + 0.08163265305

Combine like terms: 0.7142857143 + 0.08163265305 = 0.79591836735
0.08163265305 + 0.5714285714x + x2 = 0.79591836735

Factor a perfect square on the left side:
(x + 0.2857142857)(x + 0.2857142857) = 0.79591836735

Calculate the square root of the right side: 0.892142571

Break this problem into two subproblems by setting 
(x + 0.2857142857) equal to 0.892142571 and -0.892142571.

Subproblem 1

x + 0.2857142857 = 0.892142571 Simplifying x + 0.2857142857 = 0.892142571 Reorder the terms: 0.2857142857 + x = 0.892142571 Solving 0.2857142857 + x = 0.892142571 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2857142857' to each side of the equation. 0.2857142857 + -0.2857142857 + x = 0.892142571 + -0.2857142857 Combine like terms: 0.2857142857 + -0.2857142857 = 0.0000000000 0.0000000000 + x = 0.892142571 + -0.2857142857 x = 0.892142571 + -0.2857142857 Combine like terms: 0.892142571 + -0.2857142857 = 0.6064282853 x = 0.6064282853 Simplifying x = 0.6064282853

Subproblem 2

x + 0.2857142857 = -0.892142571 Simplifying x + 0.2857142857 = -0.892142571 Reorder the terms: 0.2857142857 + x = -0.892142571 Solving 0.2857142857 + x = -0.892142571 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2857142857' to each side of the equation. 0.2857142857 + -0.2857142857 + x = -0.892142571 + -0.2857142857 Combine like terms: 0.2857142857 + -0.2857142857 = 0.0000000000 0.0000000000 + x = -0.892142571 + -0.2857142857 x = -0.892142571 + -0.2857142857 Combine like terms: -0.892142571 + -0.2857142857 = -1.1778568567 x = -1.1778568567 Simplifying x = -1.1778568567

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.6064282853, -1.1778568567}

See similar equations:

| x(C)=7x^2+5x-5 | | x+2(x^2)=36 | | 20x^2+19x-237=0 | | x=8x^2+2x-9 | | 6(-2-5)-8(-2)= | | 9x^2-6=0 | | 2(6z-1)-3(z+4)=6(z+1) | | x^2-4n-1=0 | | 5(3z-7z+4)=0 | | p(x)=x^4-2x^3+8x-16 | | z^2+6z+8= | | 3(4z-1)-2(z+3)=7(z+1) | | 5x+2-3(x+2)=-2(x+1)+5(x-2) | | 4(2p-3)+5(3p-4)=14 | | 52x-1=32x-4 | | 12n-36=n^2 | | (n-6)(n+6)=0 | | n(n+6)=0 | | 1160-16t^2=0 | | 2+3x-14=7x-8-x | | 1960-16t^2=0 | | 3(6z-1)-5(z+3)=5(z+1) | | 7x+4=5x+16Answer | | 10x+10=x^2+x | | 1810-16t^2=0 | | 1400-16t^2=0 | | 5x^2+34x+42=0 | | 2x+35-y= | | 6x^2-17x+25=0 | | (-3)*2*(-1)*(-2)*4= | | x^2+y^2+6x+8y+9=0 | | |-2|=4/2 |

Equations solver categories