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Simplifying
3y2 + -8 + -13 = 0
Reorder the terms:
-8 + -13 + 3y2 = 0
Combine like terms: -8 + -13 = -21
-21 + 3y2 = 0
Solving
-21 + 3y2 = 0
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '21' to each side of the equation.
-21 + 21 + 3y2 = 0 + 21
Combine like terms: -21 + 21 = 0
0 + 3y2 = 0 + 21
3y2 = 0 + 21
Combine like terms: 0 + 21 = 21
3y2 = 21
Divide each side by '3'.
y2 = 7
Simplifying
y2 = 7
Take the square root of each side:
y = {-2.645751311, 2.645751311}
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