x^2-20x-64=0

Simple and best practice solution for x^2-20x-64=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^2-20x-64=0 equation:


Simplifying
x2 + -20x + -64 = 0

Reorder the terms:
-64 + -20x + x2 = 0

Solving
-64 + -20x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '64' to each side of the equation.
-64 + -20x + 64 + x2 = 0 + 64

Reorder the terms:
-64 + 64 + -20x + x2 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + -20x + x2 = 0 + 64
-20x + x2 = 0 + 64

Combine like terms: 0 + 64 = 64
-20x + x2 = 64

The x term is -20x.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20x + 100 + x2 = 64 + 100

Reorder the terms:
100 + -20x + x2 = 64 + 100

Combine like terms: 64 + 100 = 164
100 + -20x + x2 = 164

Factor a perfect square on the left side:
(x + -10)(x + -10) = 164

Calculate the square root of the right side: 12.806248475

Break this problem into two subproblems by setting 
(x + -10) equal to 12.806248475 and -12.806248475.

Subproblem 1

x + -10 = 12.806248475 Simplifying x + -10 = 12.806248475 Reorder the terms: -10 + x = 12.806248475 Solving -10 + x = 12.806248475 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = 12.806248475 + 10 Combine like terms: -10 + 10 = 0 0 + x = 12.806248475 + 10 x = 12.806248475 + 10 Combine like terms: 12.806248475 + 10 = 22.806248475 x = 22.806248475 Simplifying x = 22.806248475

Subproblem 2

x + -10 = -12.806248475 Simplifying x + -10 = -12.806248475 Reorder the terms: -10 + x = -12.806248475 Solving -10 + x = -12.806248475 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = -12.806248475 + 10 Combine like terms: -10 + 10 = 0 0 + x = -12.806248475 + 10 x = -12.806248475 + 10 Combine like terms: -12.806248475 + 10 = -2.806248475 x = -2.806248475 Simplifying x = -2.806248475

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.806248475, -2.806248475}

See similar equations:

| 6+2(3j-2)=2(2+2j) | | 7x-8=-x-16 | | 8t+20+5t-5= | | 15*x=24 | | -3y=-x+5 | | 5a+7=-6a+7 | | -36=-3x-6x | | 12x=16x-32 | | 8+5x=-7+1 | | x+4=9999/6 | | 10-4(1-2p)=2p+6 | | 8(4u-1)12u=11(2u-6) | | 2x+23=5x+12 | | 4k+12-6k=-3+28 | | 4x+5=-2x-4 | | -9t+24=-t | | 8(2t+1)-(t-9)=-52-8t | | 2y+8y-7=93 | | -1h-h=20/4 | | -6x-5y=-65 | | 0.5x+.8x=x+3 | | 3y-10+y+56=8y+50-6y | | -16=x+10 | | y=9-2 | | y=9-1 | | 4x+5+2x=x-12 | | 2x(-5)=23 | | -5(2p+2)-16=2(5p+7) | | 5a+7=6a-7 | | 37b+7=81b-194 | | -(y*y-2)=y*y-5-2y*y | | x-11=-5-30 |

Equations solver categories