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Simplifying
(7y)(7y) = 28
Remove parenthesis around (7y)
7y(7y) = 28
Remove parenthesis around (7y)
7y * 7y = 28
Reorder the terms for easier multiplication:
7 * 7y * y = 28
Multiply 7 * 7
49y * y = 28
Multiply y * y
49y2 = 28
Solving
49y2 = 28
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Divide each side by '49'.
y2 = 0.5714285714
Simplifying
y2 = 0.5714285714
Take the square root of each side:
y = {-0.755928946, 0.755928946}
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