4x(x+5)=25

Simple and best practice solution for 4x(x+5)=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 4x(x+5)=25 equation:


Simplifying
4x(x + 5) = 25

Reorder the terms:
4x(5 + x) = 25
(5 * 4x + x * 4x) = 25
(20x + 4x2) = 25

Solving
20x + 4x2 = 25

Solving for variable 'x'.

Reorder the terms:
-25 + 20x + 4x2 = 25 + -25

Combine like terms: 25 + -25 = 0
-25 + 20x + 4x2 = 0

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

Divide each side by '4'.
-6.25 + 5x + x2 = 0

Move the constant term to the right:

Add '6.25' to each side of the equation.
-6.25 + 5x + 6.25 + x2 = 0 + 6.25

Reorder the terms:
-6.25 + 6.25 + 5x + x2 = 0 + 6.25

Combine like terms: -6.25 + 6.25 = 0.00
0.00 + 5x + x2 = 0 + 6.25
5x + x2 = 0 + 6.25

Combine like terms: 0 + 6.25 = 6.25
5x + x2 = 6.25

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 = 6.25 + 6.25

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

Combine like terms: 6.25 + 6.25 = 12.5
6.25 + 5x + x2 = 12.5

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 12.5

Calculate the square root of the right side: 3.535533906

Break this problem into two subproblems by setting 
(x + 2.5) equal to 3.535533906 and -3.535533906.

Subproblem 1

x + 2.5 = 3.535533906 Simplifying x + 2.5 = 3.535533906 Reorder the terms: 2.5 + x = 3.535533906 Solving 2.5 + x = 3.535533906 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 = 3.535533906 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 3.535533906 + -2.5 x = 3.535533906 + -2.5 Combine like terms: 3.535533906 + -2.5 = 1.035533906 x = 1.035533906 Simplifying x = 1.035533906

Subproblem 2

x + 2.5 = -3.535533906 Simplifying x + 2.5 = -3.535533906 Reorder the terms: 2.5 + x = -3.535533906 Solving 2.5 + x = -3.535533906 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 = -3.535533906 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -3.535533906 + -2.5 x = -3.535533906 + -2.5 Combine like terms: -3.535533906 + -2.5 = -6.035533906 x = -6.035533906 Simplifying x = -6.035533906

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.035533906, -6.035533906}

See similar equations:

| -3-9=5x+4-4x | | (4-5-6)+x=9 | | 5(2x-1)-10x= | | 83-2x=2x+23 | | 2(4x)=5(4x-9) | | 2x-9x+6x-7x= | | (7x^3-4x^2+8x-7)+2(-2x^3+5x-3)= | | 6x+5(X-4)-(7X+1)=3 | | -9-1=7x+6-6x | | x-8x+6x-7x= | | (t-7)(2t^2+3t-9)=0 | | 16x-2x+7= | | 12y-2x= | | log(x^2-9)-log(x-5)= | | x-5=2.98 | | 0.3x-1.1=1.8x+1.7 | | log(x^2-9)-log(x-5)=log(2x-1) | | 0.06(y-1)+0.18y=0.04y-0.9 | | -x+4=23 | | x^2+150x-10000=0 | | (m-6)(2m+5)(6m-7)=99 | | 2x+9y=4.5 | | (m-1)(m+1)=5 | | 3t-5=4(t+2) | | (m+3)=0 | | 4x-7x+2x-6x= | | 4x=250 | | 6x-18=5x+18 | | 5(x+8)-38= | | x-2=6.64 | | -2x-5y=3.5 | | 7(z-3)+8z-1= |

Equations solver categories