分解因式:4x^2-1/4 y^2=________,ax^2-ay^2=_________,x^2y-9y=_________.

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分解因式:4x^2-1/4 y^2=________,ax^2-ay^2=_________,x^2y-9y=_________.
分解因式:4x^2-1/4 y^2=________,ax^2-ay^2=_________,x^2y-9y=_________.

分解因式:4x^2-1/4 y^2=________,ax^2-ay^2=_________,x^2y-9y=_________.
(1)4x²-1/4y²
=(2x+y/2)(2x-y/2)
(2)ax²-ay²
=a(x²-y²)
=a(x+y)(x-y)
(3)x²y-9y
=y(x²-9)
=y(x+3)(x-3)

(2x+y/2)(2x-y/2) a(x+y)(x-y) y(x+3)(x-3)