produce+x+101周洁琼

强俗威4404分解因式x^3 - 18x^2+96x - 160 -
须齿肯13494631609 ______ x^3-18x^2+96x-160=x^3-10x^2-8x^2+80x+16x-160=x^2(x-10)-8x(x-10)+16(x-10)=(x-10)(x^2-8x+16)=(x-10)(x-4)^2

强俗威4404小青在银行存了200元,小玉存了150元,以后每个月小青存10元,小玉存20元,几个月后两人存款额才相同?200+10x=150+20x怎样算?答者加倍 -
须齿肯13494631609 ______[答案] 设x个月后两人存款相同 200+10x=150+20x 移项得: 200-150=20x-10x 50=10x 10x=50 x=5 答:5个月后两人存款额相同

强俗威4404某工厂现在平均每天比原计划多生产10台机器,现在生产700台机器所需时间与原计划生产500台机器所需时间相同,设原计划平均每天生产x台机器,根据题... -
须齿肯13494631609 ______[选项] A. 700 x= 500 x+10 B. 700 x-10= 500 x C. 700 x= 500 x-10 D. 700 x+10= 500 x

强俗威4404(3+X)(3 - 0.5X)=10 -
须齿肯13494631609 ______ (3+x)(3-0.5x)=109-1.5x+3x-0.5x^2=10 x^2-3x+2=0(x-1)*(x-2)=0 x=1或x=2

强俗威4404六年级同学制作了78件蝴蝶标本,贴在九块展板上展出.每块小展板贴六件,每块大展板贴十件.两种展板各 -
须齿肯13494631609 ______ 6X9=54(只)78-54=24(只)大展板:24/(10-6)=24/4=6(块)小展板:10-6=4(块)

强俗威4404matlab画函数的图象 z=3*x^2+10*y^2+3*x*y - 3*x+2*y+1, - 2 -
须齿肯13494631609 ______[答案] ezmesh('3*x^2+10*y^2+3*x*y-3*x+2*y+1',[-2 2 -1 1])

强俗威4404x+x+10°+x+20°=180°怎么解?详细一点 -
须齿肯13494631609 ______[答案] x+x+10°+x+20°=180° 3x=180°-10°-20° 3x=150° x=50°

强俗威4404求(3x^2+9x+7)/(x+1) - (2x^2+5x - 3)/(x - 1) - (x^3+x - 1)/(x^2 - 1)的值 -
须齿肯13494631609 ______[答案] (3x^2+9x+7)/(x+1)-(2x^2+5x-3)/(x-1)-(x^3+x-1)/(x^2-1) =[(3x²+9x+7)(x-1)-(2x²+5x-3)(x+1)-(x³+x-1)]/(x²-1) =[3x³-3x²+9x²-9x+7x-7-(2x³+2x²+5x²+5x-3x-3)-(x³+x-1)]/(x²-1) =(3x³+6x²-2x-7-2x³-7x²-2x+3-x³-x+1)/(x²-1) =(-x²-5x-3)/(x²-1) ...

强俗威4404(x+1)(x+2)(x+3)(x+4) - 15 -
须齿肯13494631609 ______[答案] 原式=[(x+1)(x+4)][(x+2)(x+3)]=(x²+5x+4)(x²+5x+6)=[(x²+5x)]²+10(x²+5x)+24=x^4+10x^3+25x²+10x²+50x+24=x^4+10x^3+35x²+50x+24