提公因式与公式综合 3y²-27 3x;3x³-48x x³-x 4ax²-16
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提公因式与公式综合 3y²-27 3x;3x³-48x x³-x 4ax²-16ay²
a5次方 -a x³-4x²+4x 2x²-12x²+18x 8a-4a²-4
a5次方 -a x³-4x²+4x 2x²-12x²+18x 8a-4a²-4
3y²-27
=3(y²-9)
=3(y+3)(y-3)
3x³-48x
=3x(x²-16)
=3x(x+4)(x-4)
x³-x
=x(x²-1)
=x(x+1)(x-1)
4ax²-16ay²
=4a(x²-4y²)
=4a(x+2y)(x-2y)
a5次方 -a
=a(a4的次方-1)
=a(a²+1)(a²-1)
=a(a²+1)(a+1)(a-1)
x³-4x²+4x
=x(x²-4x+4)
=x(x-2)²
2x³-12x²+18x
=2x(x²-6x+9)
=2x(x-3)²
8a-4a²-4
=-4(a²-2a+1)
=-4(a-1)²
=3(y²-9)
=3(y+3)(y-3)
3x³-48x
=3x(x²-16)
=3x(x+4)(x-4)
x³-x
=x(x²-1)
=x(x+1)(x-1)
4ax²-16ay²
=4a(x²-4y²)
=4a(x+2y)(x-2y)
a5次方 -a
=a(a4的次方-1)
=a(a²+1)(a²-1)
=a(a²+1)(a+1)(a-1)
x³-4x²+4x
=x(x²-4x+4)
=x(x-2)²
2x³-12x²+18x
=2x(x²-6x+9)
=2x(x-3)²
8a-4a²-4
=-4(a²-2a+1)
=-4(a-1)²
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