5y^2-28y+9=0

Simple and best practice solution for 5y^2-28y+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 5y^2-28y+9=0 equation:


Simplifying
5y2 + -28y + 9 = 0

Reorder the terms:
9 + -28y + 5y2 = 0

Solving
9 + -28y + 5y2 = 0

Solving for variable 'y'.

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

Divide each side by '5'.
1.8 + -5.6y + y2 = 0

Move the constant term to the right:

Add '-1.8' to each side of the equation.
1.8 + -5.6y + -1.8 + y2 = 0 + -1.8

Reorder the terms:
1.8 + -1.8 + -5.6y + y2 = 0 + -1.8

Combine like terms: 1.8 + -1.8 = 0.0
0.0 + -5.6y + y2 = 0 + -1.8
-5.6y + y2 = 0 + -1.8

Combine like terms: 0 + -1.8 = -1.8
-5.6y + y2 = -1.8

The y term is -5.6y.  Take half its coefficient (-2.8).
Square it (7.84) and add it to both sides.

Add '7.84' to each side of the equation.
-5.6y + 7.84 + y2 = -1.8 + 7.84

Reorder the terms:
7.84 + -5.6y + y2 = -1.8 + 7.84

Combine like terms: -1.8 + 7.84 = 6.04
7.84 + -5.6y + y2 = 6.04

Factor a perfect square on the left side:
(y + -2.8)(y + -2.8) = 6.04

Calculate the square root of the right side: 2.457641145

Break this problem into two subproblems by setting 
(y + -2.8) equal to 2.457641145 and -2.457641145.

Subproblem 1

y + -2.8 = 2.457641145 Simplifying y + -2.8 = 2.457641145 Reorder the terms: -2.8 + y = 2.457641145 Solving -2.8 + y = 2.457641145 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.8' to each side of the equation. -2.8 + 2.8 + y = 2.457641145 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + y = 2.457641145 + 2.8 y = 2.457641145 + 2.8 Combine like terms: 2.457641145 + 2.8 = 5.257641145 y = 5.257641145 Simplifying y = 5.257641145

Subproblem 2

y + -2.8 = -2.457641145 Simplifying y + -2.8 = -2.457641145 Reorder the terms: -2.8 + y = -2.457641145 Solving -2.8 + y = -2.457641145 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2.8' to each side of the equation. -2.8 + 2.8 + y = -2.457641145 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + y = -2.457641145 + 2.8 y = -2.457641145 + 2.8 Combine like terms: -2.457641145 + 2.8 = 0.342358855 y = 0.342358855 Simplifying y = 0.342358855

Solution

The solution to the problem is based on the solutions from the subproblems. y = {5.257641145, 0.342358855}

See similar equations:

| 10x+9x=42+x | | 5x-8=8x+19 | | 33-(2c+4)=2(c+7+c) | | 2m+3=22 | | 3=.5*9.81x^2 | | 3=.5*0.91x^2 | | 5c-2a-3a+c= | | 454x+33=65x+4 | | Y=0.25x^2-0.5-2 | | f(x)=7x^2-2x+3 | | 8-3x+12= | | X^3x-4x+2=0 | | 1x+10x=109+x | | y=7-9x | | 4x^4y^5z^2= | | 5=(x+4) | | 48+96x-16x^2=0 | | 5-t= | | 6x+225=15x-9 | | 9z+5=3z+9q | | (4x+7)(3x-1)=0 | | (8a^5b^8)(-4x^2y^6)= | | 3+2=6 | | (-7x^7y^3)(0)(-7x^4y)= | | 4x^2468-8x^1234+4=0 | | ?+5=8 | | +5=8 | | x+(146-x)=180 | | 3*-3-3= | | 4x^2-11x+23=8x+2 | | 8x^2-30x^2+25=0 | | (3x^2+4x-4)=0 |

Equations solver categories