20x^2+21x-5=0

Simple and best practice solution for 20x^2+21x-5=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 20x^2+21x-5=0 equation:


Simplifying
20x2 + 21x + -5 = 0

Reorder the terms:
-5 + 21x + 20x2 = 0

Solving
-5 + 21x + 20x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-5 + -4x)(1 + -5x) = 0

Subproblem 1

Set the factor '(-5 + -4x)' equal to zero and attempt to solve: Simplifying -5 + -4x = 0 Solving -5 + -4x = 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 + -4x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -4x = 0 + 5 -4x = 0 + 5 Combine like terms: 0 + 5 = 5 -4x = 5 Divide each side by '-4'. x = -1.25 Simplifying x = -1.25

Subproblem 2

Set the factor '(1 + -5x)' equal to zero and attempt to solve: Simplifying 1 + -5x = 0 Solving 1 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -5x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -5x = 0 + -1 -5x = 0 + -1 Combine like terms: 0 + -1 = -1 -5x = -1 Divide each side by '-5'. x = 0.2 Simplifying x = 0.2

Solution

x = {-1.25, 0.2}

See similar equations:

| 6y-5=8y-31 | | -x+5y=-20 | | 0=3(12-b)-3b | | X+x+x+6+x+4+x+9+x=9 | | -2n-5=9 | | -2x-7.2=18.2 | | -2x+9=19 | | -2+9=19 | | z+y=r | | 5b=2q-4j | | -1.7(x-7)=40.8 | | t-7=12 | | -2y-7=3 | | 5x+3=2x+28 | | 0.6c=2c-7 | | x+.15x=790 | | 5n+16xy=0 | | -75+5=230 | | 6(1.5h-1)=5(2.2h+3) | | 2m^2+m^1= | | 6v^3=384 | | 2u+16=36 | | 2c-2=6 | | x^2-8x=-6 | | 3x-12=5x+32 | | 14=5-3(2t-1) | | x=13x-7 | | x=3x+173 | | 9.2-4w=-2(3w+5) | | (4r-2)(r+4)= | | 2x^2-7x-17=0 | | 3*5= |

Equations solver categories