20+21x+x^2=120

Simple and best practice solution for 20+21x+x^2=120 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 20+21x+x^2=120 equation:


Simplifying
20 + 21x + x2 = 120

Solving
20 + 21x + x2 = 120

Solving for variable 'x'.

Reorder the terms:
20 + -120 + 21x + x2 = 120 + -120

Combine like terms: 20 + -120 = -100
-100 + 21x + x2 = 120 + -120

Combine like terms: 120 + -120 = 0
-100 + 21x + x2 = 0

Factor a trinomial.
(-25 + -1x)(4 + -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 '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-25, 4}

See similar equations:

| -5n+1-6n+n-4=10 | | 2x-8/2=14 | | 3p^2+30p+48= | | x^2=11x-21 | | 8x^2+83x+240=0 | | 2x^2-16x+20=0 | | 3x=270/15 | | 2r^2-14r=88 | | 300=x+0.02*x | | 2x^2-4x=o | | 3z^3+6z^2= | | 1/2-1/6x=1/6 | | a(dy/dx)-ay=y-x(dy/dX) | | 3r+5/2-2=13 | | h=-16t^2+Vot | | t+2/2-1/4=1 | | 7+7x=-29+x | | 3(2n+5)=3(n+7) | | 2c-7-6c=-15 | | 12abc=12abc | | 3x-9=6x+18 | | 12x+3y=72 | | 7n^2-280=21n | | p=22+132 | | 9(x-2)=108 | | 2t-21=39 | | 3n+15=21 | | 8x^2-35x-4=0 | | 35-4x=11-10x | | -5+1-2n+n-4=5 | | .2x+2.25=7.65 | | (b+5)2.5=-4 |

Equations solver categories