-4y^2-12y+5=0

Simple and best practice solution for -4y^2-12y+5=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 -4y^2-12y+5=0 equation:


Simplifying
-4y2 + -12y + 5 = 0

Reorder the terms:
5 + -12y + -4y2 = 0

Solving
5 + -12y + -4y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-1.25 + 3y + y2 = 0

Move the constant term to the right:

Add '1.25' to each side of the equation.
-1.25 + 3y + 1.25 + y2 = 0 + 1.25

Reorder the terms:
-1.25 + 1.25 + 3y + y2 = 0 + 1.25

Combine like terms: -1.25 + 1.25 = 0.00
0.00 + 3y + y2 = 0 + 1.25
3y + y2 = 0 + 1.25

Combine like terms: 0 + 1.25 = 1.25
3y + y2 = 1.25

The y term is 3y.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3y + 2.25 + y2 = 1.25 + 2.25

Reorder the terms:
2.25 + 3y + y2 = 1.25 + 2.25

Combine like terms: 1.25 + 2.25 = 3.5
2.25 + 3y + y2 = 3.5

Factor a perfect square on the left side:
(y + 1.5)(y + 1.5) = 3.5

Calculate the square root of the right side: 1.870828693

Break this problem into two subproblems by setting 
(y + 1.5) equal to 1.870828693 and -1.870828693.

Subproblem 1

y + 1.5 = 1.870828693 Simplifying y + 1.5 = 1.870828693 Reorder the terms: 1.5 + y = 1.870828693 Solving 1.5 + y = 1.870828693 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + y = 1.870828693 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + y = 1.870828693 + -1.5 y = 1.870828693 + -1.5 Combine like terms: 1.870828693 + -1.5 = 0.370828693 y = 0.370828693 Simplifying y = 0.370828693

Subproblem 2

y + 1.5 = -1.870828693 Simplifying y + 1.5 = -1.870828693 Reorder the terms: 1.5 + y = -1.870828693 Solving 1.5 + y = -1.870828693 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + y = -1.870828693 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + y = -1.870828693 + -1.5 y = -1.870828693 + -1.5 Combine like terms: -1.870828693 + -1.5 = -3.370828693 y = -3.370828693 Simplifying y = -3.370828693

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.370828693, -3.370828693}

See similar equations:

| 6(x-7)=9x-18 | | 2x+382=2500 | | 80-25-24=32-1 | | 4u^2+21u=5 | | -7x+20=-2(x+5) | | 1.5/6=8/r | | 6x^3-46x^2+88x=0 | | 9-(-18a)=-1 | | 8(w-8)=3w-14 | | -6n+2n=-8 | | -2x^3-34x^2+76x=0 | | 15/90.5=25/x | | 8(w-8)=3x-14 | | 6x^2-111x-57=0 | | a-8=6+5a | | 9p+6=9+8p | | 3x/8-5x/4=13 | | 4(m+9)=-29(m-5)+2 | | 5x+18=2(x+6) | | (-8x^2+2-8x^3)-(7-4x^2)= | | 30/27=90/x | | (y^3*x^4)dx=x^4*dy-5y^3*dx | | 3/j=50.9/16 | | 5+a/9=-1 | | 3(x-6)-6x=-27 | | a-8=6+51/3 | | 3x^3-34x^2+56x=0 | | 10x^2+90x+75=0 | | 6/40*10/12 | | 4z^2+24z=-160 | | 4x^3-70x^2+34x=0 | | 32=4(u+3)-8u |

Equations solver categories