3-x(x-5)=5

Simple and best practice solution for 3-x(x-5)=5 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 3-x(x-5)=5 equation:


Simplifying
3 + -1x(x + -5) = 5

Reorder the terms:
3 + -1x(-5 + x) = 5
3 + (-5 * -1x + x * -1x) = 5
3 + (5x + -1x2) = 5

Solving
3 + 5x + -1x2 = 5

Solving for variable 'x'.

Reorder the terms:
3 + -5 + 5x + -1x2 = 5 + -5

Combine like terms: 3 + -5 = -2
-2 + 5x + -1x2 = 5 + -5

Combine like terms: 5 + -5 = 0
-2 + 5x + -1x2 = 0

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

Divide each side by '-1'.
2 + -5x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -5x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -5x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -5x + x2 = 0 + -2
-5x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-5x + x2 = -2

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -2 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -2 + 6.25

Combine like terms: -2 + 6.25 = 4.25
6.25 + -5x + x2 = 4.25

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 4.25

Calculate the square root of the right side: 2.061552813

Break this problem into two subproblems by setting 
(x + -2.5) equal to 2.061552813 and -2.061552813.

Subproblem 1

x + -2.5 = 2.061552813 Simplifying x + -2.5 = 2.061552813 Reorder the terms: -2.5 + x = 2.061552813 Solving -2.5 + x = 2.061552813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 2.061552813 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 2.061552813 + 2.5 x = 2.061552813 + 2.5 Combine like terms: 2.061552813 + 2.5 = 4.561552813 x = 4.561552813 Simplifying x = 4.561552813

Subproblem 2

x + -2.5 = -2.061552813 Simplifying x + -2.5 = -2.061552813 Reorder the terms: -2.5 + x = -2.061552813 Solving -2.5 + x = -2.061552813 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -2.061552813 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -2.061552813 + 2.5 x = -2.061552813 + 2.5 Combine like terms: -2.061552813 + 2.5 = 0.438447187 x = 0.438447187 Simplifying x = 0.438447187

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.561552813, 0.438447187}

See similar equations:

| 24k^2-31k-36=k | | 0.6(x-1.3)=.15 | | 27-4t-12t=t-7 | | X^2-5x-29=0 | | 12x+3x=100+22 | | 64=((2*h)*h)/2 | | 5x+5x=70 | | x^2-6-5x=0 | | -8m-3m=16 | | 64=(2h*h)/2 | | 7(4n-5m)= | | (8i)(4i)(9i)= | | 13x^2+44x+14=7x^2 | | (X-5y)(x+3y)= | | y=x^3-81x | | 3x^2-15-2x=0 | | 72=3(3z) | | 9(g-5h)= | | 10x-9y=2 | | 15x+7x-2=0 | | x+x+74=180 | | f(x)=3x^2+5x-7 | | 30=22.5/r | | (7x+3)(2x+6)=0 | | y=-x^2-10x+25 | | 10(b+4c)= | | 3x+34=9x-2 | | 1/(2sin(2x) | | 89-73=27y-31y | | 2x-(-4)=212 | | 2a+7=51 | | 2v-2=3v+15 |

Equations solver categories