0
Anonymous
88 + 5y - y2 66 - 3y + y2 Subtract: 22 + 8y -2y2
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X2 + y2 = 100 = r2 r = 10
5
y2 + 8y + 16 = y2 + 4y + 4y + 16 = y(y + 4) + 4(y + 4) = (y + 4)(y + 4) or (y + 4)2
3
The one which says: y2 = 4 - 4/25 x2