2x^2+2x-840=0

Simple and best practice solution for 2x^2+2x-840=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 2x^2+2x-840=0 equation:


Simplifying
2x2 + 2x + -840 = 0

Reorder the terms:
-840 + 2x + 2x2 = 0

Solving
-840 + 2x + 2x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-420 + x + x2) = 0

Factor a trinomial.
2((-21 + -1x)(20 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-21 + -1x)' equal to zero and attempt to solve: Simplifying -21 + -1x = 0 Solving -21 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + -1x = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -1x = 0 + 21 -1x = 0 + 21 Combine like terms: 0 + 21 = 21 -1x = 21 Divide each side by '-1'. x = -21 Simplifying x = -21

Subproblem 2

Set the factor '(20 + -1x)' equal to zero and attempt to solve: Simplifying 20 + -1x = 0 Solving 20 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -1x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -1x = 0 + -20 -1x = 0 + -20 Combine like terms: 0 + -20 = -20 -1x = -20 Divide each side by '-1'. x = 20 Simplifying x = 20

Solution

x = {-21, 20}

See similar equations:

| (y+5)/2-(3y-1)/4=(6-5y)/6 | | 3/2v=30 | | -3=x-18 | | 1/3x+11=-1 | | 8(x-3)^2/4(x-3)(x+3) | | 4z+2-3z+5=3+z+4 | | r-5h=3m+zr | | a+a+30+2a=110 | | (-4/5)^5*1/4 | | -5=-9x+3 | | 3m+zr=r-5h | | -9+3=-5 | | 9/10+9/20 | | (2775-1200)/150 | | 1/4(-7.2-2.4) | | 2775-1200/150 | | 3.5x=-17.5 | | 5-4x+12=29-x | | x=2775-1200/150 | | 4/x+2=5/2x+13/6 | | x=67.1 | | -28-1/8p=3/8p | | 12b-15b-8+6=4b+6-1 | | 0.04(x+7)=0.02(2x+7)+0.14 | | 8-3(10-3)/21 | | s=2.000+(0.18)(d-6.000) | | 2y-5y=13 | | x+0.6x=240 | | (6b+3)/3-(3b-1)/2=(9b+5)/6 | | x+.06x=240 | | 6(x+4)+2=9x-3(x-5) | | (7/4x-1)=(2/x+1) |

Equations solver categories