2y^2(y^2+2)=y^2+18

Simple and best practice solution for 2y^2(y^2+2)=y^2+18 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(y^2+2)=y^2+18 equation:


Simplifying
2y2(y2 + 2) = y2 + 18

Reorder the terms:
2y2(2 + y2) = y2 + 18
(2 * 2y2 + y2 * 2y2) = y2 + 18
(4y2 + 2y4) = y2 + 18

Reorder the terms:
4y2 + 2y4 = 18 + y2

Solving
4y2 + 2y4 = 18 + y2

Solving for variable 'y'.

Reorder the terms:
-18 + 4y2 + -1y2 + 2y4 = 18 + y2 + -18 + -1y2

Combine like terms: 4y2 + -1y2 = 3y2
-18 + 3y2 + 2y4 = 18 + y2 + -18 + -1y2

Reorder the terms:
-18 + 3y2 + 2y4 = 18 + -18 + y2 + -1y2

Combine like terms: 18 + -18 = 0
-18 + 3y2 + 2y4 = 0 + y2 + -1y2
-18 + 3y2 + 2y4 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-18 + 3y2 + 2y4 = 0

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

Divide each side by '2'.
-9 + 1.5y2 + y4 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 1.5y2 + 9 + y4 = 0 + 9

Reorder the terms:
-9 + 9 + 1.5y2 + y4 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 1.5y2 + y4 = 0 + 9
1.5y2 + y4 = 0 + 9

Combine like terms: 0 + 9 = 9
1.5y2 + y4 = 9

The y term is 1.5y2.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5y2 + 0.5625 + y4 = 9 + 0.5625

Reorder the terms:
0.5625 + 1.5y2 + y4 = 9 + 0.5625

Combine like terms: 9 + 0.5625 = 9.5625
0.5625 + 1.5y2 + y4 = 9.5625

Factor a perfect square on the left side:
(y2 + 0.75)(y2 + 0.75) = 9.5625

Calculate the square root of the right side: 3.092329219

Break this problem into two subproblems by setting 
(y2 + 0.75) equal to 3.092329219 and -3.092329219.

Subproblem 1

y2 + 0.75 = 3.092329219 Simplifying y2 + 0.75 = 3.092329219 Reorder the terms: 0.75 + y2 = 3.092329219 Solving 0.75 + y2 = 3.092329219 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + y2 = 3.092329219 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + y2 = 3.092329219 + -0.75 y2 = 3.092329219 + -0.75 Combine like terms: 3.092329219 + -0.75 = 2.342329219 y2 = 2.342329219 Simplifying y2 = 2.342329219 Take the square root of each side: y = {-1.530466994, 1.530466994}

Subproblem 2

y2 + 0.75 = -3.092329219 Simplifying y2 + 0.75 = -3.092329219 Reorder the terms: 0.75 + y2 = -3.092329219 Solving 0.75 + y2 = -3.092329219 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + y2 = -3.092329219 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + y2 = -3.092329219 + -0.75 y2 = -3.092329219 + -0.75 Combine like terms: -3.092329219 + -0.75 = -3.842329219 y2 = -3.842329219 Simplifying y2 = -3.842329219 Reorder the terms: 3.842329219 + y2 = -3.842329219 + 3.842329219 Combine like terms: -3.842329219 + 3.842329219 = 0.000000000 3.842329219 + y2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

See similar equations:

| 8(8-x)=128 | | (5x+2)-4=18 | | 0.45(70)+0.25b=0.15(70+b) | | 55=5x-60 | | 9x+18+3=1 | | 7x-4-x=2x+8-3x | | (3/4)x=-12 | | -15=3(3q-10)-5q | | 0.3b+1.4=0.3(b-8) | | 12x^2-13x-4=1 | | (x-9)-13=8 | | 1-x-0.5x^2=0 | | 7=5-2(7c-2) | | x*7=42 | | -9.5y+3.6=-5.9 | | 3n+3=-444 | | 10-13x+4x^2=0 | | 15/8m-11=7/4m+1 | | 2/3(b-6/5)-13/8=45/8-6/5b | | 5+4x=6x+7 | | R+9=12 | | (8c)^2/3 | | 8x-8+x^3-9x^2= | | (3y-7x)(3y+7x)=0 | | f(x)=2x^2+5x-1 | | 0=10x^3+66x^2+14x | | 12x-25=14-33x | | 0.4(4x-1)+0.25(5x-2)=-1 | | 5(x+1)-x=29 | | 8/7×7/10 | | 7x^3-3x^2+10x+10=0 | | (9v+2u)(9v-2u)=0 |

Equations solver categories