Y^2-90=13

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Solution for Y^2-90=13 equation: 


Simplifying
Y2 + -90 = 13

Reorder the terms:
-90 + Y2 = 13

Solving
-90 + Y2 = 13

Solving for variable 'Y'.

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

Add '90' to each side of the equation.
-90 + 90 + Y2 = 13 + 90

Combine like terms: -90 + 90 = 0
0 + Y2 = 13 + 90
Y2 = 13 + 90

Combine like terms: 13 + 90 = 103
Y2 = 103

Simplifying
Y2 = 103

Take the square root of each side:
Y = {-10.148891565, 10.148891565}

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