12t^2+4t-9=0

Simple and best practice solution for 12t^2+4t-9=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 12t^2+4t-9=0 equation:


Simplifying
12t2 + 4t + -9 = 0

Reorder the terms:
-9 + 4t + 12t2 = 0

Solving
-9 + 4t + 12t2 = 0

Solving for variable 't'.

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

Divide each side by '12'.
-0.75 + 0.3333333333t + t2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + 0.3333333333t + 0.75 + t2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + 0.3333333333t + t2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + 0.3333333333t + t2 = 0 + 0.75
0.3333333333t + t2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
0.3333333333t + t2 = 0.75

The t term is 0.3333333333t.  Take half its coefficient (0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
0.3333333333t + 0.02777777779 + t2 = 0.75 + 0.02777777779

Reorder the terms:
0.02777777779 + 0.3333333333t + t2 = 0.75 + 0.02777777779

Combine like terms: 0.75 + 0.02777777779 = 0.77777777779
0.02777777779 + 0.3333333333t + t2 = 0.77777777779

Factor a perfect square on the left side:
(t + 0.1666666667)(t + 0.1666666667) = 0.77777777779

Calculate the square root of the right side: 0.881917104

Break this problem into two subproblems by setting 
(t + 0.1666666667) equal to 0.881917104 and -0.881917104.

Subproblem 1

t + 0.1666666667 = 0.881917104 Simplifying t + 0.1666666667 = 0.881917104 Reorder the terms: 0.1666666667 + t = 0.881917104 Solving 0.1666666667 + t = 0.881917104 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + t = 0.881917104 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + t = 0.881917104 + -0.1666666667 t = 0.881917104 + -0.1666666667 Combine like terms: 0.881917104 + -0.1666666667 = 0.7152504373 t = 0.7152504373 Simplifying t = 0.7152504373

Subproblem 2

t + 0.1666666667 = -0.881917104 Simplifying t + 0.1666666667 = -0.881917104 Reorder the terms: 0.1666666667 + t = -0.881917104 Solving 0.1666666667 + t = -0.881917104 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + t = -0.881917104 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + t = -0.881917104 + -0.1666666667 t = -0.881917104 + -0.1666666667 Combine like terms: -0.881917104 + -0.1666666667 = -1.0485837707 t = -1.0485837707 Simplifying t = -1.0485837707

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.7152504373, -1.0485837707}

See similar equations:

| 5-6x=2x+3 | | 2h^2+7h+4=0 | | w^2-14w+45=0 | | 14-3x=6x+21 | | 51-3x=6x+19 | | 4x-13=-7 | | 8x+6=-122 | | 2x+16=8x+4 | | 2x+5=6x-11 | | 12-10x=108-31x | | 11-9x=134-30x | | v^2-v-1=0 | | 4x+33=14-57 | | x^2-1=73x | | 95-2x=43x+15 | | -7+.5*z=-4 | | 84-3x=7x+84 | | 8x^2-40x-112=0 | | 10-7x=88-22x | | .5*y=1 | | 2x=63 | | x^2-6+2x=4-x^2-4x | | 4x+2=8x+2 | | lnx+ln(x+4)=0 | | 1+4x=10+6 | | 0.3+y=6 | | 8+x^2=9+26-x^2 | | 4x+17=12x-47 | | 32-7x=2x+21 | | n+9=-22 | | 11-9x=143-37x | | 3n+9y=5y |

Equations solver categories