x^2-11x+15=

Simple and best practice solution for x^2-11x+15= 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+15= equation:


Simplifying
x2 + -11x + 15 = 0

Reorder the terms:
15 + -11x + x2 = 0

Solving
15 + -11x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + -11x + -15 + x2 = 0 + -15

Reorder the terms:
15 + -15 + -11x + x2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -11x + x2 = 0 + -15
-11x + x2 = 0 + -15

Combine like terms: 0 + -15 = -15
-11x + x2 = -15

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 = -15 + 30.25

Reorder the terms:
30.25 + -11x + x2 = -15 + 30.25

Combine like terms: -15 + 30.25 = 15.25
30.25 + -11x + x2 = 15.25

Factor a perfect square on the left side:
(x + -5.5)(x + -5.5) = 15.25

Calculate the square root of the right side: 3.905124838

Break this problem into two subproblems by setting 
(x + -5.5) equal to 3.905124838 and -3.905124838.

Subproblem 1

x + -5.5 = 3.905124838 Simplifying x + -5.5 = 3.905124838 Reorder the terms: -5.5 + x = 3.905124838 Solving -5.5 + x = 3.905124838 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 = 3.905124838 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = 3.905124838 + 5.5 x = 3.905124838 + 5.5 Combine like terms: 3.905124838 + 5.5 = 9.405124838 x = 9.405124838 Simplifying x = 9.405124838

Subproblem 2

x + -5.5 = -3.905124838 Simplifying x + -5.5 = -3.905124838 Reorder the terms: -5.5 + x = -3.905124838 Solving -5.5 + x = -3.905124838 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 = -3.905124838 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x = -3.905124838 + 5.5 x = -3.905124838 + 5.5 Combine like terms: -3.905124838 + 5.5 = 1.594875162 x = 1.594875162 Simplifying x = 1.594875162

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.405124838, 1.594875162}

See similar equations:

| 10u-9u=17 | | 6w+12=20+2w | | 4p-3p+10+2p-4= | | 2X+(X-3)=-(X+1)+126 | | x^2+3x-17=2x-5 | | 3z-2z=16 | | BD=X+1+2X | | 18w-10w=16 | | 49-22x=4(9-5x)-3 | | 3x+2.5y=10000 | | -32=-7n-12 | | 2x^2-3t+4=0 | | f(x)=x^2-8+15 | | (X^2-64)(x^2-9)=0 | | (3h)2+(5h)4=46 | | 3x-9=2(x-7) | | -4w+13w+5=6w+31 | | 15t=-5t^2+20t | | -5i(3-4i)= | | x^2+4x+2=-12 | | 4x+2y-3x= | | 10=10+2f | | -2=8-e | | -9(4n-3)=23+8n | | 11x-101=-7x+169 | | (5-i)-(11-i)= | | Y=-200000*ln(500000000)+5000000 | | -32+8x=11x+25 | | 4x-5=3x-11 | | -9x-146=44+x | | -122-4x=-11x+74 | | 2578/15= |

Equations solver categories