5x^2+11x-2=0

Simple and best practice solution for 5x^2+11x-2=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 5x^2+11x-2=0 equation:


Simplifying
5x2 + 11x + -2 = 0

Reorder the terms:
-2 + 11x + 5x2 = 0

Solving
-2 + 11x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-0.4 + 2.2x + x2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + 2.2x + 0.4 + x2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + 2.2x + x2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + 2.2x + x2 = 0 + 0.4
2.2x + x2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
2.2x + x2 = 0.4

The x term is 2.2x.  Take half its coefficient (1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
2.2x + 1.21 + x2 = 0.4 + 1.21

Reorder the terms:
1.21 + 2.2x + x2 = 0.4 + 1.21

Combine like terms: 0.4 + 1.21 = 1.61
1.21 + 2.2x + x2 = 1.61

Factor a perfect square on the left side:
(x + 1.1)(x + 1.1) = 1.61

Calculate the square root of the right side: 1.268857754

Break this problem into two subproblems by setting 
(x + 1.1) equal to 1.268857754 and -1.268857754.

Subproblem 1

x + 1.1 = 1.268857754 Simplifying x + 1.1 = 1.268857754 Reorder the terms: 1.1 + x = 1.268857754 Solving 1.1 + x = 1.268857754 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = 1.268857754 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = 1.268857754 + -1.1 x = 1.268857754 + -1.1 Combine like terms: 1.268857754 + -1.1 = 0.168857754 x = 0.168857754 Simplifying x = 0.168857754

Subproblem 2

x + 1.1 = -1.268857754 Simplifying x + 1.1 = -1.268857754 Reorder the terms: 1.1 + x = -1.268857754 Solving 1.1 + x = -1.268857754 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.1' to each side of the equation. 1.1 + -1.1 + x = -1.268857754 + -1.1 Combine like terms: 1.1 + -1.1 = 0.0 0.0 + x = -1.268857754 + -1.1 x = -1.268857754 + -1.1 Combine like terms: -1.268857754 + -1.1 = -2.368857754 x = -2.368857754 Simplifying x = -2.368857754

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.168857754, -2.368857754}

See similar equations:

| 9(x+9)-4x=29-8 | | x/7=15/21 | | 1x+-5=4 | | x/7=1521 | | 5x+9=75-x | | 3(5x+2)=27 | | 3a+4a-8=41 | | -9.6+1.8z= | | M+-49=-28 | | 23x+-7y-3x=563 | | 3n+9=n+23 | | X=1/4y-6 | | 1.4[0.7k+2]=12.2 | | (6x-3)+(2x+8)= | | y=6E+07x-6E+07 | | 0.0x^2+0.1x-2=0 | | -7x+3[x-8]=-60 | | j/12=9/18 | | (1-(1.075)^-9)/(0.075) | | -3x=-6x+6 | | p=60+600x+15x^2 | | y-2/5=-1/6 | | -58=K+-80 | | 4x+5=-2x-5 | | 2y-10=17y | | 0.5a=3 | | Fish= | | x/y=.9375 | | 5m-5=-120 | | 8(3x+3)=24 | | 72=j+-28 | | 0.6b+19=35 |

Equations solver categories