x+18 120设宽是X[X+18]*2*2=120X=12即每个的宽是12厘米
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(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
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
求几道因式分解!x^2+9x+20x^2-5x+6x^2+x-2x^2+x-2x^2+x-2x^2-3x-18-x^2+7x-12-x^2-x+62x^2-4x-30-5x^2+25x+120
x^3-18x^2+81x
90-x=2x(18+x)
x/(x^2+6x+18)=?
x+2/3x=60 x-3/5x=120 4x+18x=1x+2/3x=60 x-3/5x=120 4x+18x=132!
x+3分之2 x=60 x-5分之3x=120 4x+18x=132x+3分之2 x=60 x-5分之3x=120 4x+18x=132
x+2/3x=60 x-2/5x=120 4x+18x=132
(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+30)*(x-18)=x*x
x^2-3x-18
2*x*x*x-6x*x+18x怎么因式分解?
60%x+25=40 x+30%x=52 19-120%x=7 4分之3x-5%x=17.5 x-10%x=18 (1-25%)x=36 2x+30%x=9.2