x^2+11x-4=0

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


Simplifying
x2 + 11x + -4 = 0

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

Solving
-4 + 11x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 11x + 4 + x2 = 0 + 4

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

Combine like terms: -4 + 4 = 0
0 + 11x + x2 = 0 + 4
11x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
11x + x2 = 4

The x term is 11x.  Take half its coefficient (5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
11x + 30.25 + x2 = 4 + 30.25

Reorder the terms:
30.25 + 11x + x2 = 4 + 30.25

Combine like terms: 4 + 30.25 = 34.25
30.25 + 11x + x2 = 34.25

Factor a perfect square on the left side:
(x + 5.5)(x + 5.5) = 34.25

Calculate the square root of the right side: 5.852349955

Break this problem into two subproblems by setting 
(x + 5.5) equal to 5.852349955 and -5.852349955.

Subproblem 1

x + 5.5 = 5.852349955 Simplifying x + 5.5 = 5.852349955 Reorder the terms: 5.5 + x = 5.852349955 Solving 5.5 + x = 5.852349955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = 5.852349955 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = 5.852349955 + -5.5 x = 5.852349955 + -5.5 Combine like terms: 5.852349955 + -5.5 = 0.352349955 x = 0.352349955 Simplifying x = 0.352349955

Subproblem 2

x + 5.5 = -5.852349955 Simplifying x + 5.5 = -5.852349955 Reorder the terms: 5.5 + x = -5.852349955 Solving 5.5 + x = -5.852349955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + x = -5.852349955 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + x = -5.852349955 + -5.5 x = -5.852349955 + -5.5 Combine like terms: -5.852349955 + -5.5 = -11.352349955 x = -11.352349955 Simplifying x = -11.352349955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.352349955, -11.352349955}

See similar equations:

| 0.3x=0.54 | | 49-28x+4x^2=0 | | -f=16 | | 66-41w=41w-21 | | 9x-10=2y+12x | | 5(n+1)=-(1-6n) | | 27*1/9 | | 1/9*27 | | 15+x/10=27 | | T/9-19=62 | | ((x^2)/12)+x+(13/6)=0 | | S=5Lw+5wh+6hL | | 10i/10 | | 2.9x+38.7=5.4-8.2x | | 4*2.5=-4*2.5-10 | | -6y=15+x | | x/7+12=-21 | | -t/4=6 | | 2x/3-7=7x+2 | | -25x+6-5x+15=0 | | p-18=52 | | 9b=6.3 | | 8/5+3/5x=44/15+8/3x+1/3 | | -3/2=-3/4+s | | 3.5b=23.8 | | .3p+7=12-.6p | | 2(y-2)=4(y+6)-2y | | x/10=-18 | | 4(2y)+2y=30 | | 1.4+a=28 | | -8.1/-9 | | -55=x-68 |

Equations solver categories