Question

巡游月球_CruiseMoon

剛學還不熟悉，求解謝謝😊

2. 因式分解下列各式:
(1) 9x¹ +5x² +1= _
(3) x³ - x²y - xy² + y³ =
3
2

Answer 1

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我就是我

9x²+5x²+1
=(9x⁴+6x²+1)-x²
=(3x²+1)²-x²
=(3x²+x+1)(3x²-x+1)

x³-x²y-xy²+y³
=x²(x-y)+y²(-x+y)
=(x-y)(x²-y²)
=(x-y)²(x+y)

巡游月球_CruiseMoon

謝謝你😊❤️