3x^2=7-5x

Simple and best practice solution for 3x^2=7-5x 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 3x^2=7-5x equation:


Simplifying
3x2 = 7 + -5x

Solving
3x2 = 7 + -5x

Solving for variable 'x'.

Reorder the terms:
-7 + 5x + 3x2 = 7 + -5x + -7 + 5x

Reorder the terms:
-7 + 5x + 3x2 = 7 + -7 + -5x + 5x

Combine like terms: 7 + -7 = 0
-7 + 5x + 3x2 = 0 + -5x + 5x
-7 + 5x + 3x2 = -5x + 5x

Combine like terms: -5x + 5x = 0
-7 + 5x + 3x2 = 0

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

Divide each side by '3'.
-2.333333333 + 1.666666667x + x2 = 0

Move the constant term to the right:

Add '2.333333333' to each side of the equation.
-2.333333333 + 1.666666667x + 2.333333333 + x2 = 0 + 2.333333333

Reorder the terms:
-2.333333333 + 2.333333333 + 1.666666667x + x2 = 0 + 2.333333333

Combine like terms: -2.333333333 + 2.333333333 = 0.000000000
0.000000000 + 1.666666667x + x2 = 0 + 2.333333333
1.666666667x + x2 = 0 + 2.333333333

Combine like terms: 0 + 2.333333333 = 2.333333333
1.666666667x + x2 = 2.333333333

The x term is 1.666666667x.  Take half its coefficient (0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
1.666666667x + 0.6944444447 + x2 = 2.333333333 + 0.6944444447

Reorder the terms:
0.6944444447 + 1.666666667x + x2 = 2.333333333 + 0.6944444447

Combine like terms: 2.333333333 + 0.6944444447 = 3.0277777777
0.6944444447 + 1.666666667x + x2 = 3.0277777777

Factor a perfect square on the left side:
(x + 0.8333333335)(x + 0.8333333335) = 3.0277777777

Calculate the square root of the right side: 1.740051085

Break this problem into two subproblems by setting 
(x + 0.8333333335) equal to 1.740051085 and -1.740051085.

Subproblem 1

x + 0.8333333335 = 1.740051085 Simplifying x + 0.8333333335 = 1.740051085 Reorder the terms: 0.8333333335 + x = 1.740051085 Solving 0.8333333335 + x = 1.740051085 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = 1.740051085 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = 1.740051085 + -0.8333333335 x = 1.740051085 + -0.8333333335 Combine like terms: 1.740051085 + -0.8333333335 = 0.9067177515 x = 0.9067177515 Simplifying x = 0.9067177515

Subproblem 2

x + 0.8333333335 = -1.740051085 Simplifying x + 0.8333333335 = -1.740051085 Reorder the terms: 0.8333333335 + x = -1.740051085 Solving 0.8333333335 + x = -1.740051085 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = -1.740051085 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = -1.740051085 + -0.8333333335 x = -1.740051085 + -0.8333333335 Combine like terms: -1.740051085 + -0.8333333335 = -2.5733844185 x = -2.5733844185 Simplifying x = -2.5733844185

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.9067177515, -2.5733844185}

See similar equations:

| 32x^6-2x^2= | | 5x^2=-45 | | 30=6(1-4n) | | 3y-y+4=0 | | 12c^3-8c^2-27c-18=0 | | =5x+y | | 10y=3y+7+6t | | x+6+15=2x-3 | | 5m+13=1 | | 3x^4/x^-2y^3 | | =c^2+4d^2-d^2 | | 81x^3/4=27 | | 9y-1=5(y-5) | | -4=5x-7(8+5x) | | 21=5(2x+1)-6x | | g+g-3+(g-3)+7+2((g-3)+7)=74 | | 1/4(12-8x)=4(-2x-6 | | 21=12y | | =25t^3-17t^3 | | (x+4)+(x-9)= | | -75=-3(-3r+4) | | =12b^2+9b^2 | | -40+6x=4+7(8x+8) | | Ln(4t-5)=7 | | 6x-3(2x-3)+9(3-x)=12 | | a+21=3(-3a+7) | | y/6-4=-10 | | 15n=-270 | | =14(2r-3) | | 7/8=u/9 | | 10(1+10m)-6m=-836 | | b^2-3b=28 |

Equations solver categories