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2 - 3y = 3y² + 9y
3y²+9y+3y-2 = 0
3y²+12y-2 = 0
y = -b ⁺₋ √b² - 4ac / 2a
= -12 ⁺₋ √ 12² - 4(3)(-2) / 2(3)
= -12 ⁺₋ √ 144+24 / 6
= -12 ⁺₋ √168 / 6
= -12 ⁺₋ 2√42 / 6
y = -6 + √42 atau y = -6 - √42