12x^2-28x-3=0

Simple and best practice solution for 12x^2-28x-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 12x^2-28x-3=0 equation:


Simplifying
12x2 + -28x + -3 = 0

Reorder the terms:
-3 + -28x + 12x2 = 0

Solving
-3 + -28x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
-0.25 + -2.333333333x + x2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -2.333333333x + 0.25 + x2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -2.333333333x + x2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -2.333333333x + x2 = 0 + 0.25
-2.333333333x + x2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-2.333333333x + x2 = 0.25

The x term is -2.333333333x.  Take half its coefficient (-1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
-2.333333333x + 1.361111112 + x2 = 0.25 + 1.361111112

Reorder the terms:
1.361111112 + -2.333333333x + x2 = 0.25 + 1.361111112

Combine like terms: 0.25 + 1.361111112 = 1.611111112
1.361111112 + -2.333333333x + x2 = 1.611111112

Factor a perfect square on the left side:
(x + -1.166666667)(x + -1.166666667) = 1.611111112

Calculate the square root of the right side: 1.269295518

Break this problem into two subproblems by setting 
(x + -1.166666667) equal to 1.269295518 and -1.269295518.

Subproblem 1

x + -1.166666667 = 1.269295518 Simplifying x + -1.166666667 = 1.269295518 Reorder the terms: -1.166666667 + x = 1.269295518 Solving -1.166666667 + x = 1.269295518 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.166666667' to each side of the equation. -1.166666667 + 1.166666667 + x = 1.269295518 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + x = 1.269295518 + 1.166666667 x = 1.269295518 + 1.166666667 Combine like terms: 1.269295518 + 1.166666667 = 2.435962185 x = 2.435962185 Simplifying x = 2.435962185

Subproblem 2

x + -1.166666667 = -1.269295518 Simplifying x + -1.166666667 = -1.269295518 Reorder the terms: -1.166666667 + x = -1.269295518 Solving -1.166666667 + x = -1.269295518 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.166666667' to each side of the equation. -1.166666667 + 1.166666667 + x = -1.269295518 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + x = -1.269295518 + 1.166666667 x = -1.269295518 + 1.166666667 Combine like terms: -1.269295518 + 1.166666667 = -0.102628851 x = -0.102628851 Simplifying x = -0.102628851

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.435962185, -0.102628851}

See similar equations:

| 3(4s+2)=32-7s | | 9(4c+3)=15 | | 4v^2-12v=0 | | s=-25+8*37 | | -3v-2+7=19 | | p(2p+3)+18=2p(p-3) | | 16h-7h-2h= | | -8-7(1+4r)=29 | | (5-v)(4v+9)=0 | | 5m-2=7m | | x^2+44x+316= | | 25=3a-4a | | 7(1-4z)=-19 | | 0.5x+0.5y=-2 | | -8(3-2b)=32 | | 15x+5=-35x-(-315) | | 22+3k=-2(5k+9) | | 9+2x-6=15 | | 42/6=n/10 | | 2s=2n+10 | | 450=(3w)2+2w | | 3x-4-2x=17 | | (4)3t+7b=760 | | 5x+9=5x-12 | | 4h+2h=23 | | (4x-1)/2=(x=5)/3 | | 225=(3w)2+2w | | X+15262=y | | R-8.5=-21 | | 5x+5+50=180 | | .5b(b+3)=27 | | y=8x^2-48x |

Equations solver categories