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1. Equacions
2. Solucions

2x²-6x=0

x²-9=0

x=0 i x=3

x=0

x=0 i x=1/4

12x²-3x=0

2/5x²=0

x²-5x=0

x²-25=0

x=0 i x=5

x=3

x=5 i x=-5