2y^2+4=20

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Solution for 2y^2+4=20 equation: 


Simplifying
2y2 + 4 = 20

Reorder the terms:
4 + 2y2 = 20

Solving
4 + 2y2 = 20

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + 2y2 = 20 + -4

Combine like terms: 4 + -4 = 0
0 + 2y2 = 20 + -4
2y2 = 20 + -4

Combine like terms: 20 + -4 = 16
2y2 = 16

Divide each side by '2'.
y2 = 8

Simplifying
y2 = 8

Take the square root of each side:
y = {-2.828427125, 2.828427125}

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