x^2-9x+20.25=13.25

Simple and best practice solution for x^2-9x+20.25=13.25 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^2-9x+20.25=13.25 equation:


Simplifying
x2 + -9x + 20.25 = 13.25

Reorder the terms:
20.25 + -9x + x2 = 13.25

Solving
20.25 + -9x + x2 = 13.25

Solving for variable 'x'.

Reorder the terms:
20.25 + -13.25 + -9x + x2 = 13.25 + -13.25

Combine like terms: 20.25 + -13.25 = 7
7 + -9x + x2 = 13.25 + -13.25

Combine like terms: 13.25 + -13.25 = 0.00
7 + -9x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -9x + -7 + x2 = 0.00 + -7

Reorder the terms:
7 + -7 + -9x + x2 = 0.00 + -7

Combine like terms: 7 + -7 = 0
0 + -9x + x2 = 0.00 + -7
-9x + x2 = 0.00 + -7

Combine like terms: 0.00 + -7 = -7
-9x + x2 = -7

The x term is -9x.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9x + 20.25 + x2 = -7 + 20.25

Reorder the terms:
20.25 + -9x + x2 = -7 + 20.25

Combine like terms: -7 + 20.25 = 13.25
20.25 + -9x + x2 = 13.25

Factor a perfect square on the left side:
(x + -4.5)(x + -4.5) = 13.25

Calculate the square root of the right side: 3.640054945

Break this problem into two subproblems by setting 
(x + -4.5) equal to 3.640054945 and -3.640054945.

Subproblem 1

x + -4.5 = 3.640054945 Simplifying x + -4.5 = 3.640054945 Reorder the terms: -4.5 + x = 3.640054945 Solving -4.5 + x = 3.640054945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 3.640054945 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 3.640054945 + 4.5 x = 3.640054945 + 4.5 Combine like terms: 3.640054945 + 4.5 = 8.140054945 x = 8.140054945 Simplifying x = 8.140054945

Subproblem 2

x + -4.5 = -3.640054945 Simplifying x + -4.5 = -3.640054945 Reorder the terms: -4.5 + x = -3.640054945 Solving -4.5 + x = -3.640054945 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -3.640054945 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -3.640054945 + 4.5 x = -3.640054945 + 4.5 Combine like terms: -3.640054945 + 4.5 = 0.859945055 x = 0.859945055 Simplifying x = 0.859945055

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.140054945, 0.859945055}

See similar equations:

| 8(n+6)+6(n+8)= | | -13y=-18-33x | | y=5x-(100+2x) | | x^2-5x-2.5=9.25 | | 0=11y+7x-18 | | 5(2f-4)=7(f+3)+1 | | 3/4p+4=25 | | .375x-.333x+6=.1667 | | -y^4*y^1= | | 2x+6x+4=40 | | m/3-5=22 | | 1/2x-6=4 | | x+x/2=90 | | 191-4x=32x+23 | | -4(2y+5)-3=-4(y+8)+2y | | m^7/12(m^-1/2+3m) | | 8x^2-20y=12 | | 3x^2-9x^2= | | -7-6x=14.9x | | W=CX-H | | 3c+4=-21 | | 3x+11=3x+22 | | 3(3x+4)-4= | | (3w-6)(-2/3) | | x^2(x^2-9)-64(x^2-9)=0 | | G/-10=-1 | | 3(5y-8)-(4y+6)= | | A/7=-10 | | n+21=40 | | 3-5[2-(5y-5)]= | | 6=71-2x+5 | | 35x^2-77x+14= |

Equations solver categories