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Simplifying
(y + -8)(y + 8) = 63
Reorder the terms:
(-8 + y)(y + 8) = 63
Reorder the terms:
(-8 + y)(8 + y) = 63
Multiply (-8 + y) * (8 + y)
(-8(8 + y) + y(8 + y)) = 63
((8 * -8 + y * -8) + y(8 + y)) = 63
((-64 + -8y) + y(8 + y)) = 63
(-64 + -8y + (8 * y + y * y)) = 63
(-64 + -8y + (8y + y2)) = 63
Combine like terms: -8y + 8y = 0
(-64 + 0 + y2) = 63
(-64 + y2) = 63
Solving
-64 + y2 = 63
Solving for variable 'y'.
Move all terms containing y to the left, all other terms to the right.
Add '64' to each side of the equation.
-64 + 64 + y2 = 63 + 64
Combine like terms: -64 + 64 = 0
0 + y2 = 63 + 64
y2 = 63 + 64
Combine like terms: 63 + 64 = 127
y2 = 127
Simplifying
y2 = 127
Take the square root of each side:
y = {-11.26942767, 11.26942767}
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