21x^2+x-2=

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


Simplifying
21x2 + x + -2 = 0

Reorder the terms:
-2 + x + 21x2 = 0

Solving
-2 + x + 21x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-1 + -3x)(2 + -7x) = 0

Subproblem 1

Set the factor '(-1 + -3x)' equal to zero and attempt to solve: Simplifying -1 + -3x = 0 Solving -1 + -3x = 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 + -3x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -3x = 0 + 1 -3x = 0 + 1 Combine like terms: 0 + 1 = 1 -3x = 1 Divide each side by '-3'. x = -0.3333333333 Simplifying x = -0.3333333333

Subproblem 2

Set the factor '(2 + -7x)' equal to zero and attempt to solve: Simplifying 2 + -7x = 0 Solving 2 + -7x = 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 + -7x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -7x = 0 + -2 -7x = 0 + -2 Combine like terms: 0 + -2 = -2 -7x = -2 Divide each side by '-7'. x = 0.2857142857 Simplifying x = 0.2857142857

Solution

x = {-0.3333333333, 0.2857142857}

See similar equations:

| 12x^3+12x^2+3x= | | 9t^2-27t+20= | | 5b^2+2b+3= | | 21r^2+r-2= | | 4a-5=13 | | 12x^2+23x+5= | | c^2=4(1+c+2) | | 0.5x+0.75*12+14=0 | | (1-c)2=4(1+c+2) | | .5(x+4)=.33(3x-6) | | r-6=-6 | | 3x^2-49+200=0 | | 7x-2y+8x+y= | | 4x^4-9x^2+7x+7=0 | | e-10=-3 | | u+6=9 | | 2*3-3+3*4= | | [12-(10-15)]-[6-(7-6)]= | | (p-1)(2p+4)=9 | | 98s^2+648s-5880=0 | | 2s^2+98s-120=0 | | 12d=6+54d | | 98s^2+648s-5881=0 | | 2x+6y=-1 | | x^2+8x+4=9 | | -16n+4=-12n-16 | | y=20+-3x | | 4(7c-1)-2=26c+4 | | 2x^2-9=1 | | 6y-2(y-2)+5= | | 5e+12= | | 4x-4b+x^2b-x^3=0 |

Equations solver categories