2x/5x-3乘于25x²-9/3乘于X/5X+3
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2x/5x-3乘于25x²-9/3乘于X/5X+32x/5x-3乘于25x²-9/3乘于X/5X+32x/5x-3乘于25x²-9/3乘于X/5X+325x²-
2x/5x-3乘于25x²-9/3乘于X/5X+3
2x/5x-3乘于25x²-9/3乘于X/5X+3
2x/5x-3乘于25x²-9/3乘于X/5X+3
25x²-9分解成(5x-3)(5X+3)