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Simplifying
400y2 + -169 = 0
Reorder the terms:
-169 + 400y2 = 0
Solving
-169 + 400y2 = 0
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '169' to each side of the equation.
-169 + 169 + 400y2 = 0 + 169
Combine like terms: -169 + 169 = 0
0 + 400y2 = 0 + 169
400y2 = 0 + 169
Combine like terms: 0 + 169 = 169
400y2 = 169
Divide each side by '400'.
y2 = 0.4225
Simplifying
y2 = 0.4225
Take the square root of each side:
y = {-0.65, 0.65}
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