x(x+9)=400

Simple and best practice solution for x(x+9)=400 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+9)=400 equation:


Simplifying
x(x + 9) = 400

Reorder the terms:
x(9 + x) = 400
(9 * x + x * x) = 400
(9x + x2) = 400

Solving
9x + x2 = 400

Solving for variable 'x'.

Reorder the terms:
-400 + 9x + x2 = 400 + -400

Combine like terms: 400 + -400 = 0
-400 + 9x + x2 = 0

Factor a trinomial.
(-25 + -1x)(16 + -1x) = 0

Subproblem 1

Set the factor '(-25 + -1x)' equal to zero and attempt to solve: Simplifying -25 + -1x = 0 Solving -25 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + -1x = 0 + 25 Combine like terms: -25 + 25 = 0 0 + -1x = 0 + 25 -1x = 0 + 25 Combine like terms: 0 + 25 = 25 -1x = 25 Divide each side by '-1'. x = -25 Simplifying x = -25

Subproblem 2

Set the factor '(16 + -1x)' equal to zero and attempt to solve: Simplifying 16 + -1x = 0 Solving 16 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -16 + -1x = 0 + -16 Combine like terms: 16 + -16 = 0 0 + -1x = 0 + -16 -1x = 0 + -16 Combine like terms: 0 + -16 = -16 -1x = -16 Divide each side by '-1'. x = 16 Simplifying x = 16

Solution

x = {-25, 16}

See similar equations:

| 4x+44=4x+2 | | log[5]10-log[5](1-3x)=3 | | 15x^2+14x-88=0 | | 12(0.5x-5)=-6(-10)+1 | | 1.5x-2.3=0.25+2 | | (2x+y)dx+(2y+x)=0 | | y=120-10x | | 7(y-2)=12 | | X-x+x+2=13 | | v=(6)(7)(x+9) | | 6p^2-16p-8=6p^2-3p+5 | | 12n^3+4n^2-3n-1=0 | | -2=2n-8 | | 4X+(3x-8)=90 | | 10c+-11c=-19 | | 7(y-2)=2 | | 5m^2+27m+28=0 | | 5x+11=4x-6 | | (3x)(4x-24)=180 | | Y^2+8y=153 | | 25h-7(71)=800 | | ln*e^2= | | 4x^4+20x^2+15=0 | | 2v^2-19v+24=0 | | x+14+90=180 | | (3x-x+3)5=7.4 | | 4x+-19x+-7=8 | | 6m+m-4(-2m+1-m)whenm=8 | | 55=h-2 | | 2x+7-x+17=-4 | | n^2-7n-6=0 | | 8a+-5a+7=31 |

Equations solver categories