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数学
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已知A=9X^4-21X^3-2X^2+11X-2,B=3X^3-5X^2-4X+1.求A^2除以B^2=?
人气:372 ℃ 时间:2019-08-21 01:47:57
解答
A-3xB=9(x²)²-21x³-2x²+11x-2-9(x²)²+15x³+12x²-3x=-6x³+10x²+8x-2=-2B
也就是A-3xB+2B=0,以上主要是首先配出首项,然后再根据多项式加减得出余项系数.
A=(3x-2)B
∴A/B=3x-2
∴A²/B²=(3x-2)²=9x²-12x+4
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