x^2-14=15x

Simple and best practice solution for x^2-14=15x 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^2-14=15x equation:


Simplifying
x2 + -14 = 15x

Reorder the terms:
-14 + x2 = 15x

Solving
-14 + x2 = 15x

Solving for variable 'x'.

Reorder the terms:
-14 + -15x + x2 = 15x + -15x

Combine like terms: 15x + -15x = 0
-14 + -15x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + -15x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + -15x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + -15x + x2 = 0 + 14
-15x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
-15x + x2 = 14

The x term is -15x.  Take half its coefficient (-7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
-15x + 56.25 + x2 = 14 + 56.25

Reorder the terms:
56.25 + -15x + x2 = 14 + 56.25

Combine like terms: 14 + 56.25 = 70.25
56.25 + -15x + x2 = 70.25

Factor a perfect square on the left side:
(x + -7.5)(x + -7.5) = 70.25

Calculate the square root of the right side: 8.381527307

Break this problem into two subproblems by setting 
(x + -7.5) equal to 8.381527307 and -8.381527307.

Subproblem 1

x + -7.5 = 8.381527307 Simplifying x + -7.5 = 8.381527307 Reorder the terms: -7.5 + x = 8.381527307 Solving -7.5 + x = 8.381527307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = 8.381527307 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = 8.381527307 + 7.5 x = 8.381527307 + 7.5 Combine like terms: 8.381527307 + 7.5 = 15.881527307 x = 15.881527307 Simplifying x = 15.881527307

Subproblem 2

x + -7.5 = -8.381527307 Simplifying x + -7.5 = -8.381527307 Reorder the terms: -7.5 + x = -8.381527307 Solving -7.5 + x = -8.381527307 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = -8.381527307 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = -8.381527307 + 7.5 x = -8.381527307 + 7.5 Combine like terms: -8.381527307 + 7.5 = -0.881527307 x = -0.881527307 Simplifying x = -0.881527307

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.881527307, -0.881527307}

See similar equations:

| x+(x*2)=450 | | x^2+x-2=2 | | (X+4+5)*(x+5)=480 | | 6*(a-43)-36=18 | | 6x(a-43)-36=18 | | (y-4)/2=(2-y)/3 | | 4(22+13)=28 | | 4x-5=1/3 | | 7-4x/53 | | 3x+21=66 | | 2y-9*2= | | 2x-5=x-(3x+4) | | 2(5x+3)=2(4x+2) | | 6x=168000-8x | | 15-3x/5=9 | | 483+60=843 | | 4sin+1=2sin | | 15z+2=32 | | 7-(3x+12)=22-6x | | 9a+7=6a-5 | | 6x-4(2x)-3x+4=0 | | 10a-7=3a+28 | | -2y+2=3 | | 5.7-4(m-5)=4/5 | | x+.40x=210000 | | 4-7w(2)=3(2w+10) | | 7(-9r-5)=49 | | (A-6b)(a+6b)= | | 2(-4+8h)=24 | | x-(x*20/100)=80 | | x/3x=5 | | 9k-4=3k+20 |

Equations solver categories