2y^2-3.6y-2=0

Simple and best practice solution for 2y^2-3.6y-2=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 2y^2-3.6y-2=0 equation:


Simplifying
2y2 + -3.6y + -2 = 0

Reorder the terms:
-2 + -3.6y + 2y2 = 0

Solving
-2 + -3.6y + 2y2 = 0

Solving for variable 'y'.

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

Divide each side by '2'.
-1 + -1.8y + y2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -1.8y + 1 + y2 = 0 + 1

Reorder the terms:
-1 + 1 + -1.8y + y2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -1.8y + y2 = 0 + 1
-1.8y + y2 = 0 + 1

Combine like terms: 0 + 1 = 1
-1.8y + y2 = 1

The y term is -1.8y.  Take half its coefficient (-0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
-1.8y + 0.81 + y2 = 1 + 0.81

Reorder the terms:
0.81 + -1.8y + y2 = 1 + 0.81

Combine like terms: 1 + 0.81 = 1.81
0.81 + -1.8y + y2 = 1.81

Factor a perfect square on the left side:
(y + -0.9)(y + -0.9) = 1.81

Calculate the square root of the right side: 1.345362405

Break this problem into two subproblems by setting 
(y + -0.9) equal to 1.345362405 and -1.345362405.

Subproblem 1

y + -0.9 = 1.345362405 Simplifying y + -0.9 = 1.345362405 Reorder the terms: -0.9 + y = 1.345362405 Solving -0.9 + y = 1.345362405 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.9' to each side of the equation. -0.9 + 0.9 + y = 1.345362405 + 0.9 Combine like terms: -0.9 + 0.9 = 0.0 0.0 + y = 1.345362405 + 0.9 y = 1.345362405 + 0.9 Combine like terms: 1.345362405 + 0.9 = 2.245362405 y = 2.245362405 Simplifying y = 2.245362405

Subproblem 2

y + -0.9 = -1.345362405 Simplifying y + -0.9 = -1.345362405 Reorder the terms: -0.9 + y = -1.345362405 Solving -0.9 + y = -1.345362405 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '0.9' to each side of the equation. -0.9 + 0.9 + y = -1.345362405 + 0.9 Combine like terms: -0.9 + 0.9 = 0.0 0.0 + y = -1.345362405 + 0.9 y = -1.345362405 + 0.9 Combine like terms: -1.345362405 + 0.9 = -0.445362405 y = -0.445362405 Simplifying y = -0.445362405

Solution

The solution to the problem is based on the solutions from the subproblems. y = {2.245362405, -0.445362405}

See similar equations:

| g(0)=-(0)+3 | | 1080=(18000)(R)(1) | | 16+5x=9x | | N+6+7= | | g(-2)=-(-2)+3 | | -3[x-2]+7=28 | | -4(x+4)-8=0 | | 0.83x-0.75x=10 | | x+(.66x)=190 | | 26-(x+8)=7x-6 | | 7(x-7)+7=2(x-6) | | 3(4+-1.3)+4y=12 | | x^4-3x^3+2x^2+x-3=0 | | 5g=6+7g | | 5(5x-2)+5=-3 | | 81(s^2)+126s+49=0 | | 7/100+7/25 | | f(2)=2*(2) | | f(0)=2*(0) | | 2x+1+0.5x=0.66x+3+0.66x | | 2y^2-3xy-2=0 | | f(-2)=2*(-2) | | 0.3(n-24)=0.6n | | 7/13+10/13-6/13 | | f(2)=2*2 | | 4[2(3x-4)-4(3x-6)]=8x-64 | | -y+5/3=-5/4y-1/2 | | (7x-5)(x-8)= | | 7+10x=3-2x | | 0.5(x+7)+-4(8x+-4)=16 | | 7/8b-2=15/16b+3 | | 11x+2y=-74 |

Equations solver categories