18-2X

(x^2-x)^2-18(x^2-x)+72(x+1)(x+2)-x-10 因式分解(x+1)(x+2)-x-10(x²-x)²-18(x²-x)+72 x^3-18x^2+81x 90-x=2x(18+x) x/(x^2+6x+18)=? 35道.符号^代表平方.读起来就是（X的平方）.1,x^-x-202,x^-9x+203,x^-9x-204,x^+9x+205,x^-18x+326,x^+14x-317,x^+18x+328,x^+14x-329,x^+19x+4810,x^+47x-4811,x^+13x-4812,x^+2x-4813,x^+26x+4814,x^-22x-4815,x^+17x+7216,x^+21x-10017,x^-x-7218,x （x^2-x)^2-18(x^2-x)+72 因式分解 (x^2-x)^2-18(x^2-x)+72因式分解 x+(x+3)+2x+(2x-18)=255 x^2=(x+30)X(x-18)怎么解 x^2-3x-18 2*x*x*x-6x*x+18x怎么因式分解? 数学化简3x-x^2/5x+4 x 18/4x-12(3x-x^2)/(5x+4) x 18/(4x-12) 1.2x^2+x >02.x^2-3x-18≤03.-x^2+x≥3x+14.x（x+9）＞3（x-3） matlab中a(x)=x^4+3x^3+9x-18 b(x)=x^5-4x^3-18x+7 c(x)=x^7+6x^5+9x^3-5x^2-2 d(x)=x^9-8x^7+6x^5-4x^4+d(x)=x^9-8x^7+6x^5-4x^4+6x^2+3 求e(x)=a(x)*b(x)*c(x)*d(x) 解方程 式子 6-2x+3x=3x-4x+3x+18 6-x+3x=2x-5x+1 2x-1=5x-36-2x+3x=3x-4x+3x+18 6-x+3x=2x-5x+12x-1=5x-3 1.x²-2x-3 2.x²-5x-6 3.x²-9x-10 4.x²-9x-10 5.x²-2x-8 6.x²+2x-8 7.x²-x-12 8.x²+x-12 9.x²+6x-16 10.x²-14x-32 11.x²+7x-18 x^2+x^-2=x^4,化简(x+x^-1+x2)(x-x^-1+x²)（-x+x^-1+x²）(x+x^-1-x²)第18题,