21x^2+23x-20=0

Simple and best practice solution for 21x^2+23x-20=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 21x^2+23x-20=0 equation:


Simplifying
21x2 + 23x + -20 = 0

Reorder the terms:
-20 + 23x + 21x2 = 0

Solving
-20 + 23x + 21x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-5 + -3x)(4 + -7x) = 0

Subproblem 1

Set the factor '(-5 + -3x)' equal to zero and attempt to solve: Simplifying -5 + -3x = 0 Solving -5 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -3x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -3x = 0 + 5 -3x = 0 + 5 Combine like terms: 0 + 5 = 5 -3x = 5 Divide each side by '-3'. x = -1.666666667 Simplifying x = -1.666666667

Subproblem 2

Set the factor '(4 + -7x)' equal to zero and attempt to solve: Simplifying 4 + -7x = 0 Solving 4 + -7x = 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 + -7x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -7x = 0 + -4 -7x = 0 + -4 Combine like terms: 0 + -4 = -4 -7x = -4 Divide each side by '-7'. x = 0.5714285714 Simplifying x = 0.5714285714

Solution

x = {-1.666666667, 0.5714285714}

See similar equations:

| 0.1v+0.1=0.6v-0.6 | | 2.75x=99 | | -7w-19=-4w+8 | | 8+6x=4x | | 4-0.035x=0.1-0.5x | | x^2-4000x+4000000=0 | | 4(1/x)=3+5/2(1/x) | | x-1/4x-7/16=0 | | -9w+1=-5w-13 | | 4(1/x)=3+5/2(x) | | t+6t=210 | | 6y+4=-2(y+2) | | =2x-3 | | c-5/28=0 | | 3/2x9/4/11/8 | | (9q+4)+(2q+8)= | | .25=1+f | | 3(4p+3)-4(p-7)= | | 14y-32+46=y | | 14y-32+46=37 | | (n+2)/(n-8)-(n-6)/(n+4) | | 4/9+18/24 | | 39=2v+3(v-2) | | 12x-10=10x+10 | | 3x+2=7x-2 | | m+3=2-2m | | 17z-4=13z-36 | | 2x+30=3x-15 | | -8x-12=2x+8 | | (3/7x21/27)/5/6 | | -8=a/-8 | | -6(-8x+4)-2=-8x+30 |

Equations solver categories