0=-8x^2-12x-3

Simple and best practice solution for 0=-8x^2-12x-3 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 0=-8x^2-12x-3 equation:


Simplifying
0 = -8x2 + -12x + -3

Reorder the terms:
0 = -3 + -12x + -8x2

Solving
0 = -3 + -12x + -8x2

Solving for variable 'x'.

Combine like terms: 0 + 3 = 3
3 + 12x + 8x2 = -3 + -12x + -8x2 + 3 + 12x + 8x2

Reorder the terms:
3 + 12x + 8x2 = -3 + 3 + -12x + 12x + -8x2 + 8x2

Combine like terms: -3 + 3 = 0
3 + 12x + 8x2 = 0 + -12x + 12x + -8x2 + 8x2
3 + 12x + 8x2 = -12x + 12x + -8x2 + 8x2

Combine like terms: -12x + 12x = 0
3 + 12x + 8x2 = 0 + -8x2 + 8x2
3 + 12x + 8x2 = -8x2 + 8x2

Combine like terms: -8x2 + 8x2 = 0
3 + 12x + 8x2 = 0

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

Divide each side by '8'.
0.375 + 1.5x + x2 = 0

Move the constant term to the right:

Add '-0.375' to each side of the equation.
0.375 + 1.5x + -0.375 + x2 = 0 + -0.375

Reorder the terms:
0.375 + -0.375 + 1.5x + x2 = 0 + -0.375

Combine like terms: 0.375 + -0.375 = 0.000
0.000 + 1.5x + x2 = 0 + -0.375
1.5x + x2 = 0 + -0.375

Combine like terms: 0 + -0.375 = -0.375
1.5x + x2 = -0.375

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = -0.375 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = -0.375 + 0.5625

Combine like terms: -0.375 + 0.5625 = 0.1875
0.5625 + 1.5x + x2 = 0.1875

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 0.1875

Calculate the square root of the right side: 0.433012702

Break this problem into two subproblems by setting 
(x + 0.75) equal to 0.433012702 and -0.433012702.

Subproblem 1

x + 0.75 = 0.433012702 Simplifying x + 0.75 = 0.433012702 Reorder the terms: 0.75 + x = 0.433012702 Solving 0.75 + x = 0.433012702 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 0.433012702 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 0.433012702 + -0.75 x = 0.433012702 + -0.75 Combine like terms: 0.433012702 + -0.75 = -0.316987298 x = -0.316987298 Simplifying x = -0.316987298

Subproblem 2

x + 0.75 = -0.433012702 Simplifying x + 0.75 = -0.433012702 Reorder the terms: 0.75 + x = -0.433012702 Solving 0.75 + x = -0.433012702 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -0.433012702 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -0.433012702 + -0.75 x = -0.433012702 + -0.75 Combine like terms: -0.433012702 + -0.75 = -1.183012702 x = -1.183012702 Simplifying x = -1.183012702

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.316987298, -1.183012702}

See similar equations:

| 6n+6=-4n+16 | | 6n-4=-40+2n | | 15x+39x+5=x+5 | | 8-i/7-6i | | 5n+6=9+2n | | 25+(3x-4)=33 | | 2x+8=2(x+6) | | 3/2x-3/2=x-3/4 | | 10=76+nb | | -7(n+2)+18=-4n-5 | | 0,03041=3,9720*h^(8/3) | | (8^5)/(3^4-2^7) | | Wy=3x+5 | | 4x^2-25/2x-5=14 | | x^(8/3)=0,007656 | | 2(p+2)-2(p+4)=-24 | | 1/45(26) | | rad(x^13/x^9) | | 1.6+0.2x=0.6x-7.6 | | 7x+2(5x-11)=165 | | 9c^2-6t+1=0 | | 9c^2-6t+1= | | V(x^2-1)/V(x-1) | | 2x/15=16 | | X(x+10)=(x+5) | | 11x=3x+27 | | (9^5)/(3^4-2^7) | | y=4(x^2)+3 | | (x+6)+8=50 | | X^2-2x+6=24-5x | | 2*cosx-2sinx=0 | | 6[7-(-3x-3)]=144x+186 |

Equations solver categories