=3x^2+11x-1

Simple and best practice solution for =3x^2+11x-1 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+11x-1 equation:


Simplifying
0 = 3x2 + 11x + -1

Reorder the terms:
0 = -1 + 11x + 3x2

Solving
0 = -1 + 11x + 3x2

Solving for variable 'x'.

Combine like terms: 0 + 1 = 1
1 + -11x + -3x2 = -1 + 11x + 3x2 + 1 + -11x + -3x2

Reorder the terms:
1 + -11x + -3x2 = -1 + 1 + 11x + -11x + 3x2 + -3x2

Combine like terms: -1 + 1 = 0
1 + -11x + -3x2 = 0 + 11x + -11x + 3x2 + -3x2
1 + -11x + -3x2 = 11x + -11x + 3x2 + -3x2

Combine like terms: 11x + -11x = 0
1 + -11x + -3x2 = 0 + 3x2 + -3x2
1 + -11x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
1 + -11x + -3x2 = 0

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

Divide each side by '-3'.
-0.3333333333 + 3.666666667x + x2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + 3.666666667x + 0.3333333333 + x2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + 3.666666667x + x2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + 3.666666667x + x2 = 0 + 0.3333333333
3.666666667x + x2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
3.666666667x + x2 = 0.3333333333

The x term is 3.666666667x.  Take half its coefficient (1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
3.666666667x + 3.361111114 + x2 = 0.3333333333 + 3.361111114

Reorder the terms:
3.361111114 + 3.666666667x + x2 = 0.3333333333 + 3.361111114

Combine like terms: 0.3333333333 + 3.361111114 = 3.6944444473
3.361111114 + 3.666666667x + x2 = 3.6944444473

Factor a perfect square on the left side:
(x + 1.833333334)(x + 1.833333334) = 3.6944444473

Calculate the square root of the right side: 1.922093767

Break this problem into two subproblems by setting 
(x + 1.833333334) equal to 1.922093767 and -1.922093767.

Subproblem 1

x + 1.833333334 = 1.922093767 Simplifying x + 1.833333334 = 1.922093767 Reorder the terms: 1.833333334 + x = 1.922093767 Solving 1.833333334 + x = 1.922093767 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.833333334' to each side of the equation. 1.833333334 + -1.833333334 + x = 1.922093767 + -1.833333334 Combine like terms: 1.833333334 + -1.833333334 = 0.000000000 0.000000000 + x = 1.922093767 + -1.833333334 x = 1.922093767 + -1.833333334 Combine like terms: 1.922093767 + -1.833333334 = 0.088760433 x = 0.088760433 Simplifying x = 0.088760433

Subproblem 2

x + 1.833333334 = -1.922093767 Simplifying x + 1.833333334 = -1.922093767 Reorder the terms: 1.833333334 + x = -1.922093767 Solving 1.833333334 + x = -1.922093767 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.833333334' to each side of the equation. 1.833333334 + -1.833333334 + x = -1.922093767 + -1.833333334 Combine like terms: 1.833333334 + -1.833333334 = 0.000000000 0.000000000 + x = -1.922093767 + -1.833333334 x = -1.922093767 + -1.833333334 Combine like terms: -1.922093767 + -1.833333334 = -3.755427101 x = -3.755427101 Simplifying x = -3.755427101

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.088760433, -3.755427101}

See similar equations:

| 4/9+1/15 | | 4x-10+3x=20 | | 21-6x=27+8 | | 2x/6=7/8 | | 2x+(7-x)=12 | | 4(6+c)=3(c-6) | | (-2y)-46=8(y-2) | | t(2t-5)= | | 15(4c-1)-8=58c+15 | | 5x+6=10x+7 | | 7x+2(25000-x)=800 | | -8n+6=-6n-6 | | 5u+11=71 | | g/4+18=5 | | -3+11=15x-5-14x | | 3-x=23 | | 2+3-x=x | | (2+4)*5+10-18+7+5*(7+1*3)= | | 10x-3y=4 | | 5x-7=8x-13 | | 2x+33=-9 | | 2/3y-5+21 | | s(n)=3n-1 | | 48-13=5(x-9) | | -4x+26=26 | | 1+x=1.55x | | 27+4y-6=14y-14-3y | | 5-3(x-4)=6 | | a/5-7=-3 | | x^0y^3/y^5 | | h(6)=3x-4 | | 5x+2(6-x)=10 |

Equations solver categories