-2x^2-6x+3=0

Simple and best practice solution for -2x^2-6x+3=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 -2x^2-6x+3=0 equation:


Simplifying
-2x2 + -6x + 3 = 0

Reorder the terms:
3 + -6x + -2x2 = 0

Solving
3 + -6x + -2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-1.5 + 3x + x2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 3x + 1.5 + x2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 3x + x2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 3x + x2 = 0 + 1.5
3x + x2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
3x + x2 = 1.5

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = 1.5 + 2.25

Reorder the terms:
2.25 + 3x + x2 = 1.5 + 2.25

Combine like terms: 1.5 + 2.25 = 3.75
2.25 + 3x + x2 = 3.75

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = 3.75

Calculate the square root of the right side: 1.936491673

Break this problem into two subproblems by setting 
(x + 1.5) equal to 1.936491673 and -1.936491673.

Subproblem 1

x + 1.5 = 1.936491673 Simplifying x + 1.5 = 1.936491673 Reorder the terms: 1.5 + x = 1.936491673 Solving 1.5 + x = 1.936491673 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = 1.936491673 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = 1.936491673 + -1.5 x = 1.936491673 + -1.5 Combine like terms: 1.936491673 + -1.5 = 0.436491673 x = 0.436491673 Simplifying x = 0.436491673

Subproblem 2

x + 1.5 = -1.936491673 Simplifying x + 1.5 = -1.936491673 Reorder the terms: 1.5 + x = -1.936491673 Solving 1.5 + x = -1.936491673 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + x = -1.936491673 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + x = -1.936491673 + -1.5 x = -1.936491673 + -1.5 Combine like terms: -1.936491673 + -1.5 = -3.436491673 x = -3.436491673 Simplifying x = -3.436491673

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.436491673, -3.436491673}

See similar equations:

| 4x-3*-17=26 | | -8(2t+7)=-136 | | 25=x+x(.323) | | (4x-7)=2 | | 2(f-5)=-16 | | 52=2v+16 | | 180x+75y=165 | | -2(x^2+3x+9)+3-9=0 | | -4q-17=-6q+43 | | 10d+d-9d-d=17 | | 3x+23=-2x-7 | | 3(4x+2)=10x-2 | | 14x-5=6x+1 | | 9x+1.2=-6x+7.3 | | 2tanx=7 | | -5g+2.5=18.8 | | 3g-2g+3=12 | | -2(x-5)+3=15 | | (x+5)3=36 | | 5(2l+4)=50 | | 9x^2-y^2+4=0 | | (U+5)*8=80 | | 2(a-3)=38 | | (u-6)8=24 | | 3+7t-4t+2-6= | | 0.6x+0.40(100-x)=50 | | (q-9)2=16 | | 4w^2-24w-7=0 | | (e+4)3=27 | | 3x^4=67 | | A+2b-8b= | | (Q-7)*5=25 |

Equations solver categories