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Simplifying
7y2 + -8 = 56
Reorder the terms:
-8 + 7y2 = 56
Solving
-8 + 7y2 = 56
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '8' to each side of the equation.
-8 + 8 + 7y2 = 56 + 8
Combine like terms: -8 + 8 = 0
0 + 7y2 = 56 + 8
7y2 = 56 + 8
Combine like terms: 56 + 8 = 64
7y2 = 64
Divide each side by '7'.
y2 = 9.142857143
Simplifying
y2 = 9.142857143
Take the square root of each side:
y = {-3.023715784, 3.023715784}
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