4r^2-1=-28

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Solution for 4r^2-1=-28 equation:


Simplifying
4r2 + -1 = -28

Reorder the terms:
-1 + 4r2 = -28

Solving
-1 + 4r2 = -28

Solving for variable 'r'.

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

Add '1' to each side of the equation.
-1 + 1 + 4r2 = -28 + 1

Combine like terms: -1 + 1 = 0
0 + 4r2 = -28 + 1
4r2 = -28 + 1

Combine like terms: -28 + 1 = -27
4r2 = -27

Divide each side by '4'.
r2 = -6.75

Simplifying
r2 = -6.75

Reorder the terms:
6.75 + r2 = -6.75 + 6.75

Combine like terms: -6.75 + 6.75 = 0.00
6.75 + r2 = 0.00

The solution to this equation could not be determined.

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