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Simplifying
0 = 7y2 + -56
Reorder the terms:
0 = -56 + 7y2
Solving
0 = -56 + 7y2
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '-7y2' to each side of the equation.
0 + -7y2 = -56 + 7y2 + -7y2
Remove the zero:
-7y2 = -56 + 7y2 + -7y2
Combine like terms: 7y2 + -7y2 = 0
-7y2 = -56 + 0
-7y2 = -56
Divide each side by '-7'.
y2 = 8
Simplifying
y2 = 8
Take the square root of each side:
y = {-2.828427125, 2.828427125}
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