-x^2+11=4x

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


Simplifying
-1x2 + 11 = 4x

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

Solving
11 + -1x2 = 4x

Solving for variable 'x'.

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

Combine like terms: 4x + -4x = 0
11 + -4x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-11 + 4x + x2 = 0

Move the constant term to the right:

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

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

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

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

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

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

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

Combine like terms: 11 + 4 = 15
4 + 4x + x2 = 15

Factor a perfect square on the left side:
(x + 2)(x + 2) = 15

Calculate the square root of the right side: 3.872983346

Break this problem into two subproblems by setting 
(x + 2) equal to 3.872983346 and -3.872983346.

Subproblem 1

x + 2 = 3.872983346 Simplifying x + 2 = 3.872983346 Reorder the terms: 2 + x = 3.872983346 Solving 2 + x = 3.872983346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 3.872983346 + -2 Combine like terms: 2 + -2 = 0 0 + x = 3.872983346 + -2 x = 3.872983346 + -2 Combine like terms: 3.872983346 + -2 = 1.872983346 x = 1.872983346 Simplifying x = 1.872983346

Subproblem 2

x + 2 = -3.872983346 Simplifying x + 2 = -3.872983346 Reorder the terms: 2 + x = -3.872983346 Solving 2 + x = -3.872983346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -3.872983346 + -2 Combine like terms: 2 + -2 = 0 0 + x = -3.872983346 + -2 x = -3.872983346 + -2 Combine like terms: -3.872983346 + -2 = -5.872983346 x = -5.872983346 Simplifying x = -5.872983346

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.872983346, -5.872983346}

See similar equations:

| X=842-53 | | 7(7y+6z)-42z= | | 2x^2+3x=9-2x | | 5(x-3)-9=-2(x+17) | | 5(r-1)-6=7-(r+5) | | t^2+7t-18=0 | | 15-4(d-3)=2(d+5) | | 5z-3z-18=z-4+18z | | -8045=-5k | | 5z-3z-18=z-4+18 | | 6n+9-4n=3n | | 64*w=5568 | | x(2X+5)=52 | | (-7)-(-8)x=3x | | m-4(m-n)-n= | | 201y=-1608 | | -112q=1456 | | 12x=9x-4 | | 7.5x+4.5x=96 | | 39x=663 | | n^4-11n^3+18n^2=0 | | 4(4+c)=3(c-5) | | p(85)=-7225 | | 10w^2-15w=0 | | 5b-6a+b+3a-2b= | | -252d=-5796 | | 6x^4+14x^3-20x^2=0 | | 17v=-578 | | v-11=-1 | | (2x+5)(x+1)=52 | | -6x+4-3+x=11x | | 2(5n+3)=8+2(n+3) |

Equations solver categories