(y + 2) ^ 2 = 9 (3y-1) ^ 2 solution equation

(y + 2) ^ 2 = 9 (3y-1) ^ 2 solution equation

Y + 2 = 3 (3y-1) or - 3 (3y-1)
That is 8y = 5 or 10Y = 1
The solution is y = 8 / 5 or y = 1 / 10

Solution equation: (y-3y + 2) (y + 3y-2) = y (y + 3) (Y-3)

(y-3y + 2) (y + 3y-2) = [y ^ 2 - (3y-2)] (y ^ 2 + 3y-2) = y ^ 4 - (3y-2) ^ 2 = y ^ 2 (y ^ 2-9) is reduced to 12y-4 = 0, and the solution is y = 1 / 3

Solving equation (3y-y) is equal to 3 (3y-y) - 2

Let w = 3Y & # 178; - y,
So the original equation is changed into:
W²-3W+2=0
(W-1)(W-2)=0
W = 1 or w = 2,
When w = 1, that is 3Y & # 178; - Y-1 = 0,
Y1、2=(1±√13)/6,
When w = 2, that is 3Y & # 178; - Y-2 = 0,
(3Y+2)(Y-1)=0
Y3=-2/3,Y4=1.