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Simplifying
4y2 + 4 = 25
Reorder the terms:
4 + 4y2 = 25
Solving
4 + 4y2 = 25
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + 4y2 = 25 + -4
Combine like terms: 4 + -4 = 0
0 + 4y2 = 25 + -4
4y2 = 25 + -4
Combine like terms: 25 + -4 = 21
4y2 = 21
Divide each side by '4'.
y2 = 5.25
Simplifying
y2 = 5.25
Take the square root of each side:
y = {-2.291287847, 2.291287847}
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