-7x=3x^2-1

Simple and best practice solution for -7x=3x^2-1 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=3x^2-1 equation:


Simplifying
-7x = 3x2 + -1

Reorder the terms:
-7x = -1 + 3x2

Solving
-7x = -1 + 3x2

Solving for variable 'x'.

Reorder the terms:
1 + -7x + -3x2 = -1 + 3x2 + 1 + -3x2

Reorder the terms:
1 + -7x + -3x2 = -1 + 1 + 3x2 + -3x2

Combine like terms: -1 + 1 = 0
1 + -7x + -3x2 = 0 + 3x2 + -3x2
1 + -7x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
1 + -7x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-0.3333333333 + 2.333333333x + x2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + 2.333333333x + 0.3333333333 + x2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + 2.333333333x + x2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + 2.333333333x + x2 = 0 + 0.3333333333
2.333333333x + x2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
2.333333333x + x2 = 0.3333333333

The x term is 2.333333333x.  Take half its coefficient (1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
2.333333333x + 1.361111112 + x2 = 0.3333333333 + 1.361111112

Reorder the terms:
1.361111112 + 2.333333333x + x2 = 0.3333333333 + 1.361111112

Combine like terms: 0.3333333333 + 1.361111112 = 1.6944444453
1.361111112 + 2.333333333x + x2 = 1.6944444453

Factor a perfect square on the left side:
(x + 1.166666667)(x + 1.166666667) = 1.6944444453

Calculate the square root of the right side: 1.30170828

Break this problem into two subproblems by setting 
(x + 1.166666667) equal to 1.30170828 and -1.30170828.

Subproblem 1

x + 1.166666667 = 1.30170828 Simplifying x + 1.166666667 = 1.30170828 Reorder the terms: 1.166666667 + x = 1.30170828 Solving 1.166666667 + x = 1.30170828 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = 1.30170828 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = 1.30170828 + -1.166666667 x = 1.30170828 + -1.166666667 Combine like terms: 1.30170828 + -1.166666667 = 0.135041613 x = 0.135041613 Simplifying x = 0.135041613

Subproblem 2

x + 1.166666667 = -1.30170828 Simplifying x + 1.166666667 = -1.30170828 Reorder the terms: 1.166666667 + x = -1.30170828 Solving 1.166666667 + x = -1.30170828 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x = -1.30170828 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x = -1.30170828 + -1.166666667 x = -1.30170828 + -1.166666667 Combine like terms: -1.30170828 + -1.166666667 = -2.468374947 x = -2.468374947 Simplifying x = -2.468374947

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.135041613, -2.468374947}

See similar equations:

| -108=-12p | | .33(x-1)=6 | | 5t-6=2t+12 | | x^4-y^4=0 | | 3(x+1)-5=2x+1 | | -3+14=14x-4-13x | | 2w^2+3=-7w | | 3x^2-2x-2=4 | | 3+5w-4w+-3+4= | | x=12 | | .75(x+6)=12 | | (6+u)(3u+1)=0 | | 4+10(m-4)= | | -4c+1=-11 | | -9x+6z-y-x+12y+4z-6z+5y-11x= | | -2(m-5)=16 | | 27x^3-125=0 | | 5x^2+5x=70 | | 3(x+1)-2=8-5(x+7) | | i^17= | | 1.5+0.25=0.625x-0.5 | | 4n-14-6n=-32 | | z^2-13zw+12w^2=0 | | 3b=-21 | | v^2-4v-21=0 | | 3ax=2b | | -(4y+3)-(-3y-8)=0 | | 2x^4-x^2=0 | | 2(5c-1)-4=6c+2 | | 2x(x+5)-3(x*x+2x-1)=9-5x-x*x | | 2x(x+5)-3(x+x+2x-1)=9-5x-x*x | | 550a=825 |

Equations solver categories