y*y-16=9

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Solution for y*y-16=9 equation: 


Simplifying
y * y + -16 = 9

Multiply y * y
y2 + -16 = 9

Reorder the terms:
-16 + y2 = 9

Solving
-16 + y2 = 9

Solving for variable 'y'.

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

Add '16' to each side of the equation.
-16 + 16 + y2 = 9 + 16

Combine like terms: -16 + 16 = 0
0 + y2 = 9 + 16
y2 = 9 + 16

Combine like terms: 9 + 16 = 25
y2 = 25

Simplifying
y2 = 25

Take the square root of each side:
y = {-5, 5}

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