4x^2-8y-21=0

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Solution for 4x^2-8y-21=0 equation:


Simplifying
4x2 + -8y + -21 = 0

Reorder the terms:
-21 + 4x2 + -8y = 0

Solving
-21 + 4x2 + -8y = 0

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 4x2 + 21 + -8y = 0 + 21

Reorder the terms:
-21 + 21 + 4x2 + -8y = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 4x2 + -8y = 0 + 21
4x2 + -8y = 0 + 21

Combine like terms: 0 + 21 = 21
4x2 + -8y = 21

Add '8y' to each side of the equation.
4x2 + -8y + 8y = 21 + 8y

Combine like terms: -8y + 8y = 0
4x2 + 0 = 21 + 8y
4x2 = 21 + 8y

Divide each side by '4'.
x2 = 5.25 + 2y

Simplifying
x2 = 5.25 + 2y

Reorder the terms:
-5.25 + x2 + -2y = 5.25 + 2y + -5.25 + -2y

Reorder the terms:
-5.25 + x2 + -2y = 5.25 + -5.25 + 2y + -2y

Combine like terms: 5.25 + -5.25 = 0.00
-5.25 + x2 + -2y = 0.00 + 2y + -2y
-5.25 + x2 + -2y = 2y + -2y

Combine like terms: 2y + -2y = 0
-5.25 + x2 + -2y = 0

The solution to this equation could not be determined.

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