420=12X*X

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Solution for 420=12X*X equation: 


Simplifying
420 = 12X * X

Multiply X * X
420 = 12X2

Solving
420 = 12X2

Solving for variable 'X'.

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

Add '-12X2' to each side of the equation.
420 + -12X2 = 12X2 + -12X2

Combine like terms: 12X2 + -12X2 = 0
420 + -12X2 = 0

Add '-420' to each side of the equation.
420 + -420 + -12X2 = 0 + -420

Combine like terms: 420 + -420 = 0
0 + -12X2 = 0 + -420
-12X2 = 0 + -420

Combine like terms: 0 + -420 = -420
-12X2 = -420

Divide each side by '-12'.
X2 = 35

Simplifying
X2 = 35

Take the square root of each side:
X = {-5.916079783, 5.916079783}

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