21x^2-86x+80=0

Simple and best practice solution for 21x^2-86x+80=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^2-86x+80=0 equation:


Simplifying
21x2 + -86x + 80 = 0

Reorder the terms:
80 + -86x + 21x2 = 0

Solving
80 + -86x + 21x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(10 + -7x)(8 + -3x) = 0

Subproblem 1

Set the factor '(10 + -7x)' equal to zero and attempt to solve: Simplifying 10 + -7x = 0 Solving 10 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -7x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -7x = 0 + -10 -7x = 0 + -10 Combine like terms: 0 + -10 = -10 -7x = -10 Divide each side by '-7'. x = 1.428571429 Simplifying x = 1.428571429

Subproblem 2

Set the factor '(8 + -3x)' equal to zero and attempt to solve: Simplifying 8 + -3x = 0 Solving 8 + -3x = 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 + -3x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -3x = 0 + -8 -3x = 0 + -8 Combine like terms: 0 + -8 = -8 -3x = -8 Divide each side by '-3'. x = 2.666666667 Simplifying x = 2.666666667

Solution

x = {1.428571429, 2.666666667}

See similar equations:

| h(4)=2-16 | | 8x+30=6x+66 | | 5x+9+8x-36=x | | 5(2p+8)=-6p-2(1-5p) | | 3x+2(X-4)=7 | | 3.32+4s=T | | 5(x+3)=5(x+14) | | P(x)=x^2-4 | | 7+2x=.5(14+4x) | | g=-0.2+0.3n | | -5(1+9)=6a-(a+5) | | 10y-4=5(2y-2) | | 5(x+8)=5(x+14) | | 2a^3-12a^2-32a=0 | | 5x-8=40x-8 | | 7x+5y-8=11 | | g(10)=3n-2 | | g(-4)=-16-10 | | 3(x+2)=3(x+12) | | 2a-16+7=5 | | 4(k-3)-3=-1+5(-3k+1) | | 2x-8(3.6)=22 | | 18+n=8 | | 3.5+0.25x=3.5 | | g(-4)=16-10 | | .5(6x-7)=3x+6 | | x^2-9x+20=y | | 7x+10=-8x-17 | | 22=5w-3 | | lp=50whatisy | | s=15-2s | | 15y-10y=10 |

Equations solver categories