30x^2-x-12=0

Simple and best practice solution for 30x^2-x-12=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 30x^2-x-12=0 equation:


Simplifying
30x2 + -1x + -12 = 0

Reorder the terms:
-12 + -1x + 30x2 = 0

Solving
-12 + -1x + 30x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
30 the coefficient of the squared term: 

Divide each side by '30'.
-0.4 + -0.03333333333x + x2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + -0.03333333333x + 0.4 + x2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + -0.03333333333x + x2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -0.03333333333x + x2 = 0 + 0.4
-0.03333333333x + x2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-0.03333333333x + x2 = 0.4

The x term is -0.03333333333x.  Take half its coefficient (-0.01666666667).
Square it (0.0002777777779) and add it to both sides.

Add '0.0002777777779' to each side of the equation.
-0.03333333333x + 0.0002777777779 + x2 = 0.4 + 0.0002777777779

Reorder the terms:
0.0002777777779 + -0.03333333333x + x2 = 0.4 + 0.0002777777779

Combine like terms: 0.4 + 0.0002777777779 = 0.4002777777779
0.0002777777779 + -0.03333333333x + x2 = 0.4002777777779

Factor a perfect square on the left side:
(x + -0.01666666667)(x + -0.01666666667) = 0.4002777777779

Calculate the square root of the right side: 0.632675097

Break this problem into two subproblems by setting 
(x + -0.01666666667) equal to 0.632675097 and -0.632675097.

Subproblem 1

x + -0.01666666667 = 0.632675097 Simplifying x + -0.01666666667 = 0.632675097 Reorder the terms: -0.01666666667 + x = 0.632675097 Solving -0.01666666667 + x = 0.632675097 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.01666666667' to each side of the equation. -0.01666666667 + 0.01666666667 + x = 0.632675097 + 0.01666666667 Combine like terms: -0.01666666667 + 0.01666666667 = 0.00000000000 0.00000000000 + x = 0.632675097 + 0.01666666667 x = 0.632675097 + 0.01666666667 Combine like terms: 0.632675097 + 0.01666666667 = 0.64934176367 x = 0.64934176367 Simplifying x = 0.64934176367

Subproblem 2

x + -0.01666666667 = -0.632675097 Simplifying x + -0.01666666667 = -0.632675097 Reorder the terms: -0.01666666667 + x = -0.632675097 Solving -0.01666666667 + x = -0.632675097 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.01666666667' to each side of the equation. -0.01666666667 + 0.01666666667 + x = -0.632675097 + 0.01666666667 Combine like terms: -0.01666666667 + 0.01666666667 = 0.00000000000 0.00000000000 + x = -0.632675097 + 0.01666666667 x = -0.632675097 + 0.01666666667 Combine like terms: -0.632675097 + 0.01666666667 = -0.61600843033 x = -0.61600843033 Simplifying x = -0.61600843033

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.64934176367, -0.61600843033}

See similar equations:

| 1/4-7=1/8y | | 9(x+4)+6=-12 | | 5+16t-1=8t+18-6t | | 2/5y-1=13 | | 5e^3x=70 | | -4a+3+5a=15-23 | | 8+2x-6=8x+20-3x | | -6x-11=25 | | 3x+3(x+18)=102 | | 5x-6+6y=0 | | (sqrt(10)-1)(sqrt(10)-1)(sqrt(10)-1)= | | 2X^2+2X+1=113 | | -6-11=25 | | x=0.3x+0.3y | | -9x+42=-6(X-3) | | 2(5+x)=34 | | -3(y-6)=5y-14 | | 29=-2(21-y)+3(y-3) | | x^2=x^2+4x+8 | | 38=3v+4(v-8) | | -log(X)=10.29 | | (x+18)+(x+15)+(4x+3)=180 | | 20x+13y=340 | | 36=(4x^2)+(10x) | | 8(u+3)-3u=9 | | 160=1/3b25 | | 7x-5y=19fory | | ((1-cosx)/sinx)-1 | | -36=4y+3(y-5) | | 23x-10-14x=3(3x-4)+2 | | f(x)inf(x)=-x+-x | | 6x-8+4x=-38 |

Equations solver categories