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11.b
2/5*50.000=20.000
3/5*50.000=30.000
30.000-20.000=10.000(b)
10) luas persegi=s×s
L=(x-3)×(x-3)
L=x²-3x -3x +9
L=x²-6x+9 (a)
11) jawabannya B, caranya yg ada digambar
12) dimisalkan n
6x²+4xy+y² -(n)=3x²-xy-2y² maka
n= 6x²+4xy+y² - ( 3x²-xy-2y² )
n= 6x²+4xy+y² -3x²+xy+2y²
n=3x²+5xy+3y²
inshallah jawabanya itu semoga membantu ☺