x(x+20)=702

Simple and best practice solution for x(x+20)=702 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(x+20)=702 equation:


Simplifying
x(x + 20) = 702

Reorder the terms:
x(20 + x) = 702
(20 * x + x * x) = 702
(20x + x2) = 702

Solving
20x + x2 = 702

Solving for variable 'x'.

Reorder the terms:
-702 + 20x + x2 = 702 + -702

Combine like terms: 702 + -702 = 0
-702 + 20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '702' to each side of the equation.
-702 + 20x + 702 + x2 = 0 + 702

Reorder the terms:
-702 + 702 + 20x + x2 = 0 + 702

Combine like terms: -702 + 702 = 0
0 + 20x + x2 = 0 + 702
20x + x2 = 0 + 702

Combine like terms: 0 + 702 = 702
20x + x2 = 702

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 = 702 + 100

Reorder the terms:
100 + 20x + x2 = 702 + 100

Combine like terms: 702 + 100 = 802
100 + 20x + x2 = 802

Factor a perfect square on the left side:
(x + 10)(x + 10) = 802

Calculate the square root of the right side: 28.319604517

Break this problem into two subproblems by setting 
(x + 10) equal to 28.319604517 and -28.319604517.

Subproblem 1

x + 10 = 28.319604517 Simplifying x + 10 = 28.319604517 Reorder the terms: 10 + x = 28.319604517 Solving 10 + x = 28.319604517 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 = 28.319604517 + -10 Combine like terms: 10 + -10 = 0 0 + x = 28.319604517 + -10 x = 28.319604517 + -10 Combine like terms: 28.319604517 + -10 = 18.319604517 x = 18.319604517 Simplifying x = 18.319604517

Subproblem 2

x + 10 = -28.319604517 Simplifying x + 10 = -28.319604517 Reorder the terms: 10 + x = -28.319604517 Solving 10 + x = -28.319604517 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 = -28.319604517 + -10 Combine like terms: 10 + -10 = 0 0 + x = -28.319604517 + -10 x = -28.319604517 + -10 Combine like terms: -28.319604517 + -10 = -38.319604517 x = -38.319604517 Simplifying x = -38.319604517

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.319604517, -38.319604517}

See similar equations:

| 9p-8+8= | | 3(2x-9)-3=3(x-4) | | 4x+22=-6x+52 | | -[5x-(2x+9)]=-4-[4(2x-4)-3x] | | 8r/9_ | | -3x^4+3x^3+36x^2= | | 32+4=4 | | 17y-39=80 | | 36+5x-1=8x-1 | | x-46=58 | | 4+5(6t+1)=9+30t | | 12-6x=2(5x-2) | | -1x+90=126-7x | | 8+2x+4-8y+9= | | x+37=64 | | 3x^2+6y=21 | | 26+5x=-5x+76 | | 8x-15=25-2x | | 2a+(8a+5b)= | | y=-14x+45 | | 4y-1=y+8 | | 2(2-3x)=3(4x+5) | | 3y+6=2.85 | | 4+4*7+3= | | 8x-6=10-25 | | -[2z-(6z+4)]=4+(3z+3) | | 2+18=36 | | 5.4x-3.7=1.7 | | 49+2x=69-8x | | 8t-9=7 | | y-0.34=0.8 | | 87-4x=-9x+97 |

Equations solver categories