3x^2+17x-12=0

Simple and best practice solution for 3x^2+17x-12=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+17x-12=0 equation:


Simplifying
3x2 + 17x + -12 = 0

Reorder the terms:
-12 + 17x + 3x2 = 0

Solving
-12 + 17x + 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'.
-4 + 5.666666667x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 5.666666667x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + 5.666666667x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 5.666666667x + x2 = 0 + 4
5.666666667x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
5.666666667x + x2 = 4

The x term is 5.666666667x.  Take half its coefficient (2.833333334).
Square it (8.027777782) and add it to both sides.

Add '8.027777782' to each side of the equation.
5.666666667x + 8.027777782 + x2 = 4 + 8.027777782

Reorder the terms:
8.027777782 + 5.666666667x + x2 = 4 + 8.027777782

Combine like terms: 4 + 8.027777782 = 12.027777782
8.027777782 + 5.666666667x + x2 = 12.027777782

Factor a perfect square on the left side:
(x + 2.833333334)(x + 2.833333334) = 12.027777782

Calculate the square root of the right side: 3.468108675

Break this problem into two subproblems by setting 
(x + 2.833333334) equal to 3.468108675 and -3.468108675.

Subproblem 1

x + 2.833333334 = 3.468108675 Simplifying x + 2.833333334 = 3.468108675 Reorder the terms: 2.833333334 + x = 3.468108675 Solving 2.833333334 + x = 3.468108675 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.833333334' to each side of the equation. 2.833333334 + -2.833333334 + x = 3.468108675 + -2.833333334 Combine like terms: 2.833333334 + -2.833333334 = 0.000000000 0.000000000 + x = 3.468108675 + -2.833333334 x = 3.468108675 + -2.833333334 Combine like terms: 3.468108675 + -2.833333334 = 0.634775341 x = 0.634775341 Simplifying x = 0.634775341

Subproblem 2

x + 2.833333334 = -3.468108675 Simplifying x + 2.833333334 = -3.468108675 Reorder the terms: 2.833333334 + x = -3.468108675 Solving 2.833333334 + x = -3.468108675 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.833333334' to each side of the equation. 2.833333334 + -2.833333334 + x = -3.468108675 + -2.833333334 Combine like terms: 2.833333334 + -2.833333334 = 0.000000000 0.000000000 + x = -3.468108675 + -2.833333334 x = -3.468108675 + -2.833333334 Combine like terms: -3.468108675 + -2.833333334 = -6.301442009 x = -6.301442009 Simplifying x = -6.301442009

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.634775341, -6.301442009}

See similar equations:

| 9g-6=3(4g+5) | | 3x^2-1/27x^6=0 | | 50=x+2y | | 8(x-1)-8=3x+5(-4+x) | | 15g^2-19gh-56h^2=0 | | -(-8n+2)=-4(-6+5n)+7n | | 2x^2-24=-8x | | z-8/z^2-8z | | 14+4=38 | | 8t+61=5 | | -(q+1)=-(4+q)+7q | | 29=-8t | | 7x-14=5x-2 | | 15=12m-9 | | 8g^2+6g-9=0 | | -5p-2(2p-6)=-5p+3 | | 11=9 | | 4x-5=9x+20 | | 4-4x=20x-5 | | y/5=65 | | 9=-(2-5t)-10t | | 3/16=p/40 | | 5(2)-12/3x2(2)=171/3 | | 3(6x-1)=29 | | -45-4x=90-10x | | 25-12/3(4)=171/3 | | x-x^4=0 | | 4(x+12)=-3x+6 | | 6b-23=2 | | 3(x+4)-5=37 | | 2x/3+10=x/5+36/5 | | 4y+2x-200=0 |

Equations solver categories