0=-3x^2-16x-12

Simple and best practice solution for 0=-3x^2-16x-12 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=-3x^2-16x-12 equation:


Simplifying
0 = -3x2 + -16x + -12

Reorder the terms:
0 = -12 + -16x + -3x2

Solving
0 = -12 + -16x + -3x2

Solving for variable 'x'.

Combine like terms: 0 + 12 = 12
12 + 16x + 3x2 = -12 + -16x + -3x2 + 12 + 16x + 3x2

Reorder the terms:
12 + 16x + 3x2 = -12 + 12 + -16x + 16x + -3x2 + 3x2

Combine like terms: -12 + 12 = 0
12 + 16x + 3x2 = 0 + -16x + 16x + -3x2 + 3x2
12 + 16x + 3x2 = -16x + 16x + -3x2 + 3x2

Combine like terms: -16x + 16x = 0
12 + 16x + 3x2 = 0 + -3x2 + 3x2
12 + 16x + 3x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
12 + 16x + 3x2 = 0

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

Divide each side by '3'.
4 + 5.333333333x + x2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + 5.333333333x + -4 + x2 = 0 + -4

Reorder the terms:
4 + -4 + 5.333333333x + x2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 5.333333333x + x2 = 0 + -4
5.333333333x + x2 = 0 + -4

Combine like terms: 0 + -4 = -4
5.333333333x + x2 = -4

The x term is 5.333333333x.  Take half its coefficient (2.666666667).
Square it (7.111111113) and add it to both sides.

Add '7.111111113' to each side of the equation.
5.333333333x + 7.111111113 + x2 = -4 + 7.111111113

Reorder the terms:
7.111111113 + 5.333333333x + x2 = -4 + 7.111111113

Combine like terms: -4 + 7.111111113 = 3.111111113
7.111111113 + 5.333333333x + x2 = 3.111111113

Factor a perfect square on the left side:
(x + 2.666666667)(x + 2.666666667) = 3.111111113

Calculate the square root of the right side: 1.763834208

Break this problem into two subproblems by setting 
(x + 2.666666667) equal to 1.763834208 and -1.763834208.

Subproblem 1

x + 2.666666667 = 1.763834208 Simplifying x + 2.666666667 = 1.763834208 Reorder the terms: 2.666666667 + x = 1.763834208 Solving 2.666666667 + x = 1.763834208 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.666666667' to each side of the equation. 2.666666667 + -2.666666667 + x = 1.763834208 + -2.666666667 Combine like terms: 2.666666667 + -2.666666667 = 0.000000000 0.000000000 + x = 1.763834208 + -2.666666667 x = 1.763834208 + -2.666666667 Combine like terms: 1.763834208 + -2.666666667 = -0.902832459 x = -0.902832459 Simplifying x = -0.902832459

Subproblem 2

x + 2.666666667 = -1.763834208 Simplifying x + 2.666666667 = -1.763834208 Reorder the terms: 2.666666667 + x = -1.763834208 Solving 2.666666667 + x = -1.763834208 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.666666667' to each side of the equation. 2.666666667 + -2.666666667 + x = -1.763834208 + -2.666666667 Combine like terms: 2.666666667 + -2.666666667 = 0.000000000 0.000000000 + x = -1.763834208 + -2.666666667 x = -1.763834208 + -2.666666667 Combine like terms: -1.763834208 + -2.666666667 = -4.430500875 x = -4.430500875 Simplifying x = -4.430500875

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.902832459, -4.430500875}

See similar equations:

| -4x^2-33x+5=-3 | | 300=-16t^2+120t+4 | | H=100ft | | x^2+y^2+2x-2y+18=0 | | -4x^2-33x+5=0 | | j+h=22 | | 9(p+6)= | | p(-2)=22(-2)+4 | | ab=65 | | 4x^3+60x^2+25x=20x^2 | | -2x^2=-6x | | .05x-10=0.1(x+20) | | 5/6=-35/x | | cos^3(x)=cos^2(2x) | | -4w=9 | | 10x-2(4x-8)=22 | | 25+35+x=87 | | 4y-3=5+3(y-2) | | s-21=22.3 | | 5(11w+4)= | | 4a+2+2a=20 | | 9d+9=d^3+d^2 | | -8+10=2(5-4a) | | 2y-7=-2-2y | | 3.2k-6.25=2.7k+8.9 | | 9.5t=4 | | -1/2(6x-5)= | | 3?4x?7+12x?9= | | D^6-4d^4-9d^2+36=0 | | 38t=2 | | x^3=1024 | | 3+4(x-7)=4-2(x-4) |

Equations solver categories