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February 11, 2016
Posted by **karla** on Tuesday, January 18, 2011 at 9:45pm.

- algebra 2 and trigonometry -
**helper**, Tuesday, January 18, 2011 at 9:59pmy^2-3y=9

y^2 - 3y = 9

complete the square

y^2 - 3y + 9/4 = 9 + 9/4

(y - 3/2)^2 = 45/4

+- (y - 3/2) = 45/4

solve for y

y = 3/2 (sqrt5 + 1)

y = -3/2 (-1 + sqrt5)