15=4+3w^2

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Solution for 15=4+3w^2 equation: 


Simplifying
15 = 4 + 3w2

Solving
15 = 4 + 3w2

Solving for variable 'w'.

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

Add '-3w2' to each side of the equation.
15 + -3w2 = 4 + 3w2 + -3w2

Combine like terms: 3w2 + -3w2 = 0
15 + -3w2 = 4 + 0
15 + -3w2 = 4

Add '-15' to each side of the equation.
15 + -15 + -3w2 = 4 + -15

Combine like terms: 15 + -15 = 0
0 + -3w2 = 4 + -15
-3w2 = 4 + -15

Combine like terms: 4 + -15 = -11
-3w2 = -11

Divide each side by '-3'.
w2 = 3.666666667

Simplifying
w2 = 3.666666667

Take the square root of each side:
w = {-1.914854216, 1.914854216}

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