4x^2-12r-400=0

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Solution for 4x^2-12r-400=0 equation:


Simplifying
4x2 + -12r + -400 = 0

Reorder the terms:
-400 + -12r + 4x2 = 0

Solving
-400 + -12r + 4x2 = 0

Solving for variable 'r'.

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

Add '400' to each side of the equation.
-400 + -12r + 400 + 4x2 = 0 + 400

Reorder the terms:
-400 + 400 + -12r + 4x2 = 0 + 400

Combine like terms: -400 + 400 = 0
0 + -12r + 4x2 = 0 + 400
-12r + 4x2 = 0 + 400

Combine like terms: 0 + 400 = 400
-12r + 4x2 = 400

Add '-4x2' to each side of the equation.
-12r + 4x2 + -4x2 = 400 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-12r + 0 = 400 + -4x2
-12r = 400 + -4x2

Divide each side by '-12'.
r = -33.33333333 + 0.3333333333x2

Simplifying
r = -33.33333333 + 0.3333333333x2

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