(急!)因式分解:36-1/4x²

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(急!)因式分解:36-1/4x²

(急!)因式分解:36-1/4x²
(急!)因式分解:36-1/4x²

(急!)因式分解:36-1/4x²
36-1/4x²
=1/4(144-x²)
=1/4(12²-x²)
=1/4(12+x)(12-x)

36-1/4x²=(6+1/2x)(6-1/2x)