因式分解:3x²-27
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因式分解:3x²-27
3x²-27
=3(x^2-9)
=3(x-3)(x+3)
3x²-27
=3(x²-9)
=3(x+3)(x-3)
3x²-27
=3(x² - 3² )
=3(x+3)*(x-3)
原式=3(x^2-9)
=3(x-3)(x+3)
因式分解:3x²-27
3x²-27
=3(x^2-9)
=3(x-3)(x+3)
3x²-27
=3(x²-9)
=3(x+3)(x-3)
3x²-27
=3(x² - 3² )
=3(x+3)*(x-3)
原式=3(x^2-9)
=3(x-3)(x+3)