因式分解两题 求详解
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原式=(2x)³+5³
=(2x+5)(4x²-10x+25)
原式=(x²)³-(1/4)³
=(x²-1/4)(x^4+x²/4+1/16)
=(x+1/2)(x-1/2)(x^4+x²/2+1/16-x²/4)
=(x+1/2)(x-1/2)[(x²+1/4)²-x²/4]
=(x+1/2)(x-1/2)(x²+x/2+1/4)(x²-x/2+1/4)
=(2x+5)(4x²-10x+25)
原式=(x²)³-(1/4)³
=(x²-1/4)(x^4+x²/4+1/16)
=(x+1/2)(x-1/2)(x^4+x²/2+1/16-x²/4)
=(x+1/2)(x-1/2)[(x²+1/4)²-x²/4]
=(x+1/2)(x-1/2)(x²+x/2+1/4)(x²-x/2+1/4)
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