(9y^2)-3y-4=0

Simple and best practice solution for (9y^2)-3y-4=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 (9y^2)-3y-4=0 equation:


Simplifying
(9y2) + -3y + -4 = 0

Reorder the terms:
-4 + -3y + (9y2) = 0

Solving
-4 + -3y + (9y2) = 0

Solving for variable 'y'.

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

Divide each side by '9'.
-0.4444444444 + -0.3333333333y + y2 = 0

Move the constant term to the right:

Add '0.4444444444' to each side of the equation.
-0.4444444444 + -0.3333333333y + 0.4444444444 + y2 = 0 + 0.4444444444

Reorder the terms:
-0.4444444444 + 0.4444444444 + -0.3333333333y + y2 = 0 + 0.4444444444

Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000
0.0000000000 + -0.3333333333y + y2 = 0 + 0.4444444444
-0.3333333333y + y2 = 0 + 0.4444444444

Combine like terms: 0 + 0.4444444444 = 0.4444444444
-0.3333333333y + y2 = 0.4444444444

The y term is -0.3333333333y.  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.
-0.3333333333y + 0.02777777779 + y2 = 0.4444444444 + 0.02777777779

Reorder the terms:
0.02777777779 + -0.3333333333y + y2 = 0.4444444444 + 0.02777777779

Combine like terms: 0.4444444444 + 0.02777777779 = 0.47222222219
0.02777777779 + -0.3333333333y + y2 = 0.47222222219

Factor a perfect square on the left side:
((y) + -0.1666666667)((y) + -0.1666666667) = 0.47222222219

Calculate the square root of the right side: 0.687184271

Break this problem into two subproblems by setting 
((y) + -0.1666666667) equal to 0.687184271 and -0.687184271.

Subproblem 1

(y) + -0.1666666667 = 0.687184271 Simplifying (y) + -0.1666666667 = 0.687184271 y + -0.1666666667 = 0.687184271 Reorder the terms: -0.1666666667 + y = 0.687184271 Solving -0.1666666667 + y = 0.687184271 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + y = 0.687184271 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + y = 0.687184271 + 0.1666666667 y = 0.687184271 + 0.1666666667 Combine like terms: 0.687184271 + 0.1666666667 = 0.8538509377 y = 0.8538509377 Simplifying y = 0.8538509377

Subproblem 2

(y) + -0.1666666667 = -0.687184271 Simplifying (y) + -0.1666666667 = -0.687184271 y + -0.1666666667 = -0.687184271 Reorder the terms: -0.1666666667 + y = -0.687184271 Solving -0.1666666667 + y = -0.687184271 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.1666666667' to each side of the equation. -0.1666666667 + 0.1666666667 + y = -0.687184271 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + y = -0.687184271 + 0.1666666667 y = -0.687184271 + 0.1666666667 Combine like terms: -0.687184271 + 0.1666666667 = -0.5205176043 y = -0.5205176043 Simplifying y = -0.5205176043

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.8538509377, -0.5205176043}

See similar equations:

| 65=-16x^2+80x | | (2b-3)/7-(b)/2=(b+3)/14 | | 0+2-2*0=2 | | (2+u)(2u-9)=0 | | 2w-19+3w-7+31=180 | | 0+2*2*0=2 | | F(x)=2.50x+6 | | 0*2+4=4 | | (4x)/3x-2+(2x)/3x+2=2 | | -2k^2+4k-2=0 | | 3x^2-24x=28 | | ln(x)+ln(x-5)=ln(6x) | | -8n^2+7n-4=0 | | 3x^2-24=28 | | 3.07p-4=872 | | (2a-3)/6=(2a)/3+1/2 | | (9x^4y^4z^5)(2x^5z^3)= | | 5w^2+21w+4=0 | | 3-7+7=5 | | 8b^2+4b=0 | | -3p+8=6(5p+7) | | 4.9t^2-4.9t+10=0 | | 3-7+5=5 | | x^2+4x+4=375 | | a(3a)=4a | | 2x+10=4x+32 | | (6x^5)(2x^7)= | | cos(6x)=0 | | 5(x-2)+8x-14=19 | | 4x^3-20x+8=0 | | a+2a+3a-6=7a+-6 | | x(x)=2x |

Equations solver categories