4x^2-11x-1=0

Simple and best practice solution for 4x^2-11x-1=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 4x^2-11x-1=0 equation:


Simplifying
4x2 + -11x + -1 = 0

Reorder the terms:
-1 + -11x + 4x2 = 0

Solving
-1 + -11x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-0.25 + -2.75x + x2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -2.75x + 0.25 + x2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -2.75x + x2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -2.75x + x2 = 0 + 0.25
-2.75x + x2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-2.75x + x2 = 0.25

The x term is -2.75x.  Take half its coefficient (-1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
-2.75x + 1.890625 + x2 = 0.25 + 1.890625

Reorder the terms:
1.890625 + -2.75x + x2 = 0.25 + 1.890625

Combine like terms: 0.25 + 1.890625 = 2.140625
1.890625 + -2.75x + x2 = 2.140625

Factor a perfect square on the left side:
(x + -1.375)(x + -1.375) = 2.140625

Calculate the square root of the right side: 1.463087489

Break this problem into two subproblems by setting 
(x + -1.375) equal to 1.463087489 and -1.463087489.

Subproblem 1

x + -1.375 = 1.463087489 Simplifying x + -1.375 = 1.463087489 Reorder the terms: -1.375 + x = 1.463087489 Solving -1.375 + x = 1.463087489 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + x = 1.463087489 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + x = 1.463087489 + 1.375 x = 1.463087489 + 1.375 Combine like terms: 1.463087489 + 1.375 = 2.838087489 x = 2.838087489 Simplifying x = 2.838087489

Subproblem 2

x + -1.375 = -1.463087489 Simplifying x + -1.375 = -1.463087489 Reorder the terms: -1.375 + x = -1.463087489 Solving -1.375 + x = -1.463087489 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + x = -1.463087489 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + x = -1.463087489 + 1.375 x = -1.463087489 + 1.375 Combine like terms: -1.463087489 + 1.375 = -0.088087489 x = -0.088087489 Simplifying x = -0.088087489

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.838087489, -0.088087489}

See similar equations:

| 14x-2x+9x-x-5x=40 | | 283-6x=39x+23 | | 2X^2-12x+120=0 | | 6x-13-2x=8x-6 | | X^2-6x+60=0 | | -120-9x=9x+24 | | 112-5x=4x+13 | | 78020=94000x^1 | | 2-5x=10-8x | | 2x^2+2x-1200=0 | | x^2+8x+43=0 | | 3x^2-2x-408=0 | | 7x^2=10 | | 3x+4.4=-(6.6+x) | | 2a+8=a+4 | | 5p-10=2p+11 | | 7f^2+10f+3=0 | | 9(17-3y)+4y=-31 | | 2*x^2-1=0 | | 6x-12=3x+12 | | 9h^2-30h= | | x=2*x^2-1 | | 3x+4=7x-6 | | x^2-6x-9+24=0 | | 23+5x=7+2.5x | | x=3*x-(-1.33) | | 14u=v | | (x+3.5)2=16 | | 143-7x=38x+23 | | (2x)(x+2)=(3x)(x) | | x/4=1/2-7 | | (X-7)(5X-3)=0 |

Equations solver categories