x*x-21x+54=

Simple and best practice solution for x*x-21x+54= 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-21x+54= equation:


Simplifying
x * x + -21x + 54 = 0

Multiply x * x
x2 + -21x + 54 = 0

Reorder the terms:
54 + -21x + x2 = 0

Solving
54 + -21x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(3 + -1x)(18 + -1x) = 0

Subproblem 1

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Subproblem 2

Set the factor '(18 + -1x)' equal to zero and attempt to solve: Simplifying 18 + -1x = 0 Solving 18 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + -1x = 0 + -18 Combine like terms: 18 + -18 = 0 0 + -1x = 0 + -18 -1x = 0 + -18 Combine like terms: 0 + -18 = -18 -1x = -18 Divide each side by '-1'. x = 18 Simplifying x = 18

Solution

x = {3, 18}

See similar equations:

| x*x+13x+40= | | z/8-8=9 | | (5x)^-1/2=10 | | 0.5w+1.33= | | 2/5=4/4c | | (2x*x-13x+7)-(1-12x)= | | 15z-12=72 | | 4*1+y=-6 | | 3s-4b=34 | | 2ln(x)+ln(x+1)=ln(6x) | | 0.05x+0.09(100-x)=5.8 | | (7+3i)+(9-8i)= | | 3x+275=13x-5 | | 122-9=39 | | 63=3x+5 | | z=wm | | (12)(22)=(6)(y) | | 1.4+18=6 | | 63=80-2x | | (-8x*x*x*x*x*x*y)(x*x*x*x*x*y*y)= | | -8c=-72 | | 1-x=2 | | 2w+14=50 | | (3/10)*x-(1/5)=1 | | (6x+9)(x*x-3x+1)= | | (12)(x)=(20)(6) | | 2w+14=14 | | 2*5+2*13= | | 8(y-5)+4=2y-50 | | -72=47+m | | 4*0+y=-6 | | 3a+6b+8a-2b= |

Equations solver categories