21x^2-10x-16=

Simple and best practice solution for 21x^2-10x-16= 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^2-10x-16= equation:


Simplifying
21x2 + -10x + -16 = 0

Reorder the terms:
-16 + -10x + 21x2 = 0

Solving
-16 + -10x + 21x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-2 + -3x)(8 + -7x) = 0

Subproblem 1

Set the factor '(-2 + -3x)' equal to zero and attempt to solve: Simplifying -2 + -3x = 0 Solving -2 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -3x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -3x = 0 + 2 -3x = 0 + 2 Combine like terms: 0 + 2 = 2 -3x = 2 Divide each side by '-3'. x = -0.6666666667 Simplifying x = -0.6666666667

Subproblem 2

Set the factor '(8 + -7x)' equal to zero and attempt to solve: Simplifying 8 + -7x = 0 Solving 8 + -7x = 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 + -7x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -7x = 0 + -8 -7x = 0 + -8 Combine like terms: 0 + -8 = -8 -7x = -8 Divide each side by '-7'. x = 1.142857143 Simplifying x = 1.142857143

Solution

x = {-0.6666666667, 1.142857143}

See similar equations:

| 11-3(a-1)=2+9 | | 11+78x+7x^2=0 | | 16y^2+48u+27=0 | | 11x-3=5x-4(1-2x) | | 2x+6/5=4 | | 49m+25m+49m= | | -18=4x-19 | | -6y+4=-2(4y+6) | | 14y^2-4y+3=0 | | 17x-9=12x+4 | | -3x^2-x+4=0 | | (4-x)=-11 | | x+3x^2-2= | | 3w^2+10w=-3 | | -21-(-53)+(-33)-51= | | x-26-8x=4(2-x) | | 0.625a-27=-7 | | 17=-8+(25) | | 7x^2+35x-42=0 | | x^2+3x+2=9 | | 5x+3=x-6 | | 0.25m+9=-16 | | (9)-5=4 | | X^2+12x+38= | | -21-(-3)+(-76)-21= | | 7m+4=5 | | 425=4y+25x | | 2x-10=3x+9 | | y=106.25+-6.25x | | x=106.25+-6.25y | | 2(y+2)=3(y-7) | | 3x+3-2x=10 |

Equations solver categories