-3x^2+6x+392=0

Simple and best practice solution for -3x^2+6x+392=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 -3x^2+6x+392=0 equation:


Simplifying
-3x2 + 6x + 392 = 0

Reorder the terms:
392 + 6x + -3x2 = 0

Solving
392 + 6x + -3x2 = 0

Solving for variable 'x'.

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

Divide each side by '-3'.
-130.6666667 + -2x + x2 = 0

Move the constant term to the right:

Add '130.6666667' to each side of the equation.
-130.6666667 + -2x + 130.6666667 + x2 = 0 + 130.6666667

Reorder the terms:
-130.6666667 + 130.6666667 + -2x + x2 = 0 + 130.6666667

Combine like terms: -130.6666667 + 130.6666667 = 0.0000000
0.0000000 + -2x + x2 = 0 + 130.6666667
-2x + x2 = 0 + 130.6666667

Combine like terms: 0 + 130.6666667 = 130.6666667
-2x + x2 = 130.6666667

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 130.6666667 + 1

Reorder the terms:
1 + -2x + x2 = 130.6666667 + 1

Combine like terms: 130.6666667 + 1 = 131.6666667
1 + -2x + x2 = 131.6666667

Factor a perfect square on the left side:
(x + -1)(x + -1) = 131.6666667

Calculate the square root of the right side: 11.474609653

Break this problem into two subproblems by setting 
(x + -1) equal to 11.474609653 and -11.474609653.

Subproblem 1

x + -1 = 11.474609653 Simplifying x + -1 = 11.474609653 Reorder the terms: -1 + x = 11.474609653 Solving -1 + x = 11.474609653 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 11.474609653 + 1 Combine like terms: -1 + 1 = 0 0 + x = 11.474609653 + 1 x = 11.474609653 + 1 Combine like terms: 11.474609653 + 1 = 12.474609653 x = 12.474609653 Simplifying x = 12.474609653

Subproblem 2

x + -1 = -11.474609653 Simplifying x + -1 = -11.474609653 Reorder the terms: -1 + x = -11.474609653 Solving -1 + x = -11.474609653 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -11.474609653 + 1 Combine like terms: -1 + 1 = 0 0 + x = -11.474609653 + 1 x = -11.474609653 + 1 Combine like terms: -11.474609653 + 1 = -10.474609653 x = -10.474609653 Simplifying x = -10.474609653

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.474609653, -10.474609653}

See similar equations:

| 8x-3-4x=17 | | 2+8m=26-4m | | x-5y+22=7 | | 10(x-9)-8=12 | | 3+4x=14-6x | | 7x+30=90 | | 2(2x)+2(3x+3)=146 | | 3(3+3x)+5=49 | | 5(x-2)+3=43 | | X^2-6x=-11/4 | | -109+5y+7=3(5y-3)-3 | | 2+6x=28-4x | | 4y-3+y+50=5y+50-3y | | x+3y+2=4 | | v+25=33 | | 6y+5=6(6)+5 | | 3(6x-5)+15= | | x-1/3=15 | | 38=29+w | | 11+3x=64 | | 15/6=6/5 | | 2x+x+85+85+40= | | 27=33-u | | A=2x+(50*2x) | | (36x^-2*y^1/3)^1/2 | | X+X+900=52000 | | U+3.6=5.21 | | 10x-5y=18 | | (K+3)(k-7)=0 | | (9x)/7.1=1.91 | | (4x+9)(2x-1)=0 | | 4+5w-4w=3-1 |

Equations solver categories