Y^4-4y^2-21=

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Solution for Y^4-4y^2-21= equation:


Simplifying
Y4 + -4y2 + -21 = 0

Reorder the terms:
-21 + Y4 + -4y2 = 0

Solving
-21 + Y4 + -4y2 = 0

Solving for variable 'Y'.

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

Add '21' to each side of the equation.
-21 + Y4 + 21 + -4y2 = 0 + 21

Reorder the terms:
-21 + 21 + Y4 + -4y2 = 0 + 21

Combine like terms: -21 + 21 = 0
0 + Y4 + -4y2 = 0 + 21
Y4 + -4y2 = 0 + 21

Combine like terms: 0 + 21 = 21
Y4 + -4y2 = 21

Add '4y2' to each side of the equation.
Y4 + -4y2 + 4y2 = 21 + 4y2

Combine like terms: -4y2 + 4y2 = 0
Y4 + 0 = 21 + 4y2
Y4 = 21 + 4y2

Simplifying
Y4 = 21 + 4y2

Reorder the terms:
-21 + Y4 + -4y2 = 21 + 4y2 + -21 + -4y2

Reorder the terms:
-21 + Y4 + -4y2 = 21 + -21 + 4y2 + -4y2

Combine like terms: 21 + -21 = 0
-21 + Y4 + -4y2 = 0 + 4y2 + -4y2
-21 + Y4 + -4y2 = 4y2 + -4y2

Combine like terms: 4y2 + -4y2 = 0
-21 + Y4 + -4y2 = 0

The solution to this equation could not be determined.

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