-3x^2+360x-9600=1200 There's no point in solving this equation,

-3x^2+360x-9600=1200 There's no point in solving this equation,

-3x²+360x-9600=1200
-3x²+360x-10800=0
x²-120x+3600=0
(x-60)²=0
x=60

Decomposition factor: (X & # 178; + 3x) &# 178; - 2 (X & # 178; + 3x) - 8

Take (X & # 178; + 3x) as a whole and multiply it by a cross
（x²+3x）²-2（x²+3x）-8
=[（x²+3x）-4][（x²+3x）+2]
=（x²+3x-4)（x²+3x+2)
=(x+4)(x-1)(x+2)(x+1)

Write the fruit in the brackets of the allegorical sayings
Eat in winter
The ripe red is purple
The drumsticks hit the point
Old lady eat () --- pick the soft one

Eat (plum) in winter
Ripe (grapes) - red and purple
Drumsticks (pomegranates) - hit the point
Old lady eat persimmon

On the allegorical sayings of the characters in the romance of the Three Kingdoms
(1) (2) Zhang Fei scolds Guan Yu
(3) Guan Gong releases Cao Cao (4) Kong Ming cuts Wei Yan (4)
(5) (6) Yu Boya meets Zhong Ziqi

(1) Guan Gong's surrender to Cao Cao
(3) Guan Gong releases Cao Cao - (remembering the old love) (4) Kong Ming cuts Wei Yan - (killing with a knife)
(5) (6) Yu Boya meets Zhong Ziqi - (bosom friend)