12x^2+13x-5=0

Simple and best practice solution for 12x^2+13x-5=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+13x-5=0 equation:


Simplifying
12x2 + 13x + -5 = 0

Reorder the terms:
-5 + 13x + 12x2 = 0

Solving
-5 + 13x + 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'.
-0.4166666667 + 1.083333333x + x2 = 0

Move the constant term to the right:

Add '0.4166666667' to each side of the equation.
-0.4166666667 + 1.083333333x + 0.4166666667 + x2 = 0 + 0.4166666667

Reorder the terms:
-0.4166666667 + 0.4166666667 + 1.083333333x + x2 = 0 + 0.4166666667

Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000
0.0000000000 + 1.083333333x + x2 = 0 + 0.4166666667
1.083333333x + x2 = 0 + 0.4166666667

Combine like terms: 0 + 0.4166666667 = 0.4166666667
1.083333333x + x2 = 0.4166666667

The x term is 1.083333333x.  Take half its coefficient (0.5416666665).
Square it (0.2934027776) and add it to both sides.

Add '0.2934027776' to each side of the equation.
1.083333333x + 0.2934027776 + x2 = 0.4166666667 + 0.2934027776

Reorder the terms:
0.2934027776 + 1.083333333x + x2 = 0.4166666667 + 0.2934027776

Combine like terms: 0.4166666667 + 0.2934027776 = 0.7100694443
0.2934027776 + 1.083333333x + x2 = 0.7100694443

Factor a perfect square on the left side:
(x + 0.5416666665)(x + 0.5416666665) = 0.7100694443

Calculate the square root of the right side: 0.842656184

Break this problem into two subproblems by setting 
(x + 0.5416666665) equal to 0.842656184 and -0.842656184.

Subproblem 1

x + 0.5416666665 = 0.842656184 Simplifying x + 0.5416666665 = 0.842656184 Reorder the terms: 0.5416666665 + x = 0.842656184 Solving 0.5416666665 + x = 0.842656184 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5416666665' to each side of the equation. 0.5416666665 + -0.5416666665 + x = 0.842656184 + -0.5416666665 Combine like terms: 0.5416666665 + -0.5416666665 = 0.0000000000 0.0000000000 + x = 0.842656184 + -0.5416666665 x = 0.842656184 + -0.5416666665 Combine like terms: 0.842656184 + -0.5416666665 = 0.3009895175 x = 0.3009895175 Simplifying x = 0.3009895175

Subproblem 2

x + 0.5416666665 = -0.842656184 Simplifying x + 0.5416666665 = -0.842656184 Reorder the terms: 0.5416666665 + x = -0.842656184 Solving 0.5416666665 + x = -0.842656184 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5416666665' to each side of the equation. 0.5416666665 + -0.5416666665 + x = -0.842656184 + -0.5416666665 Combine like terms: 0.5416666665 + -0.5416666665 = 0.0000000000 0.0000000000 + x = -0.842656184 + -0.5416666665 x = -0.842656184 + -0.5416666665 Combine like terms: -0.842656184 + -0.5416666665 = -1.3843228505 x = -1.3843228505 Simplifying x = -1.3843228505

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.3009895175, -1.3843228505}

See similar equations:

| F(x)=x^3+10 | | 5+21x=16x | | 2x+1-2+x-7=3x+7 | | 4x+7y=3365 | | 2x+10x-6=90 | | 9x+5+50=180 | | 1.5x-0.75=0.5 | | 4y-6=-5(y-6) | | 125=10log(x/10^12) | | 10x-19=6x+8 | | -3(2u-4)+5u=9+3(3u-4) | | 219=88-u | | 12=-6 | | -4(v-3)=-2v+2 | | solvef(x)=3x^4-16x^2+21 | | 5(u-6)-7=-5(-4u+7)-5u | | 5x-140=25 | | 4x+3-x+1+5=5x+7 | | x-4=x-2-2 | | (1.5-x)(1-x)=0 | | 4y-2+3x-1+2x+2=2y+6 | | 7(y+2)=-3(5y-7)+8y | | 3(f+1)=3f-3 | | 2/3=10/t | | 7(x+9)=4[x-(4-x)] | | g-0=g+1 | | 2sin(2x+60)= | | 2+x-5+2x-7=3x+7 | | m/5=2/5 | | 8y^2-20y= | | 5-x-3=4x-3x-8 | | 4a+1.5=5a-6.2 |

Equations solver categories