(y+7)(y+7)=y^2

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Solution for (y+7)(y+7)=y^2 equation:


Simplifying
(y + 7)(y + 7) = y2

Reorder the terms:
(7 + y)(y + 7) = y2

Reorder the terms:
(7 + y)(7 + y) = y2

Multiply (7 + y) * (7 + y)
(7(7 + y) + y(7 + y)) = y2
((7 * 7 + y * 7) + y(7 + y)) = y2
((49 + 7y) + y(7 + y)) = y2
(49 + 7y + (7 * y + y * y)) = y2
(49 + 7y + (7y + y2)) = y2

Combine like terms: 7y + 7y = 14y
(49 + 14y + y2) = y2

Add '-1y2' to each side of the equation.
49 + 14y + y2 + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
49 + 14y + 0 = y2 + -1y2
49 + 14y = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
49 + 14y = 0

Solving
49 + 14y = 0

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-49' to each side of the equation.
49 + -49 + 14y = 0 + -49

Combine like terms: 49 + -49 = 0
0 + 14y = 0 + -49
14y = 0 + -49

Combine like terms: 0 + -49 = -49
14y = -49

Divide each side by '14'.
y = -3.5

Simplifying
y = -3.5

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