-x^2+21x-104=0

Simple and best practice solution for -x^2+21x-104=0 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^2+21x-104=0 equation:


Simplifying
-1x2 + 21x + -104 = 0

Reorder the terms:
-104 + 21x + -1x2 = 0

Solving
-104 + 21x + -1x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-13 + x)(8 + -1x) = 0

Subproblem 1

Set the factor '(-13 + x)' equal to zero and attempt to solve: Simplifying -13 + x = 0 Solving -13 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = 0 + 13 Combine like terms: -13 + 13 = 0 0 + x = 0 + 13 x = 0 + 13 Combine like terms: 0 + 13 = 13 x = 13 Simplifying x = 13

Subproblem 2

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Solution

x = {13, 8}

See similar equations:

| 2.3w-(7)+8.1-3w=0 | | 0.2x+3.4+0.8x=4 | | ((20+20i)x^2)+((-3.82+21.66i)x)+(12.5-21.65i)=0 | | m+(-20)=(-12) | | 2.3w-7+8.1-3w=0 | | -46=-5(2-2x)-2(-6-7x) | | P+6/3=10/8 | | 10-7n=-31 | | 4x+1+4x+1+3x=90 | | 4x+1-5x=5 | | 6x=10x-4 | | 1/8(47-7)=x | | 6/4=n+4/7 | | (3x+71)=(6x+2) | | (20+20i)x^2+(-3.82+21.66i)x+(12.5-21.65i)=0 | | 2.3y-2.3=1.4y-14 | | 8(-2b-4)-8(6b+2)=80 | | 1/8(47-7)=5 | | 7.3x+9-6.3x=12 | | -8(1-6r)+2(r+5)=2 | | 1/8*-7 | | -156/3 | | 2x^2-4x+17=0 | | 2.05x+15=2.35x | | 5x+68+9x=180 | | 4(2-3n)-(n-5)=-13 | | 3/4y-1/4=5/4y+1/8 | | 12p-7=(-3)p+8 | | 3(3x+3)+2(1-2x)=21 | | 9x^2+72-26=0 | | -3(1+2a)+3(8a-1)=12 | | 9y^2-60y+66=0 |

Equations solver categories