[2x-18] 6*32
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我去.要不要这么节省?你这么多题一个问题.第一题,把3个多项式化简,(x-1)(x-2),(x-2)(x-16),(x+3)(x-2),公因式是x-22、同第一题那样考虑,k=-23、题是a³
1,(1)将(x+3/x-1)设为a(2)得a²-5a+6=0(3)因式分解(a-2)(a-3)=0(4)a1=2a2=32,化简得x³-4x²+18=0
依次为:(x-3)(x+1);(x+9)(x-2);(x-4)(x+1);(x+6)(x-1);(x-4)(x-9);(2x+1)(x+1)
(x^2-6x+9)÷x^2-9x+18/x+3=(x-3)^2÷(x+3)(x-3)+18/(x+3)=(x-3)/(x+3)+18/(x+3)=(x+15)/(x+3)
1/x(x+3)+1/(x+3)(x+6)+1/(x+6)(x+9)=3/2(x+9)(1/3)×[3/x(x+3)+3/(x+3)(x+6)+3/(x+6)(x+9)]=3/2(x+9)(1/3)[
原式=x^4-8x^3+13x^2+10+2x(x^2-8x+13)+(x^2-8x+13)=x^2(x^2-8x+13)+10=10分组代入后得10
x2-3x+2=(x-1)(x-2),x2-18x+32=(x-16)(x-2),x2+x-6=(x+3)(x-2),公因式为x-2.故选:D.
x+5.9=23.8移项得:x=23.8-5.9x=17.97x+2x=10.8合并同类项得:9x=10.8x=1.24×3+6x=54移项得:6x=54-126x=42x=718x-12x=24.6
x=-12x=-1x=2/3
设x1=4-√3,x2=4+√3,是方程X^2-8X+13=0的两根所以X1^2-8X1+15=2X^4-6X^3-2X^2+18X+23=(X+1)^2*(X^2-8X+13)+10=10所以原式=
1/x(x+3)+1/(x+3)(x+6)+1/(x+6)(x+9)=[1/x-1/(x+3)+1/(x+3)-1/(x+6)+1(x+6)-1/(x+9)]/3=[1/x-1/(x+9)]/3=3/
原式=½√(8x³)-3x√(2/x)+6x√(x/18)=½√[(2x)²×2x]-3x√(2x/x²)+6x√(2x/6²)=½
1/√x(√x+2)=1/√x-1/(√x+2)=(√x+2-√x)/√x(√x+2)所以,1/√x(√x+2)+1/(√x+2)(√x+4)+1/(√x+4)(√x+6)+.+1/(√x+18)(√
x^3+3x^2-6x-18=x^2(x+3)-6(x+3)=(x^2-6)(x+3)
x^6+x^5(-1-3)+x^4(-4+3+1)+x^3(7+12-1-2)+x^2(-21-4+2)+x(7+8)-14+6x^2-15x+18=0x^6-4x^5+16x^3-17x^2+4=0
原式=[x/(x-3)]-[5x/(x²-x-6)]=[x/(x-3)]-(5x)/[(x-3)(x+2)]=[x(x+2)]/[(x-3)(x+2)]-(5x)/[(x-3)(x+2)]=
第一题:各式可变为:x²-3x+2=(x-1)(x-2),x²-18x+32=(x-2)(x-16),x²+x-6=(x-2)(x+3)所以选D第二题:(x+5)乘以(x
50%x=2再答:x=4再答:1.2x=2.4再答:x=2再答:1.05x=4.2再答:x=4再答:0.5x=0.2再答:x=0.4再答:请采纳再问:可不可以把式子、过程、答案合并在一起再答:那就是过
不知道你^这个符号什么意思暂且当成平方做吧x^2+4x+3=(x+1)(x+3)(2x-x)^2=x^2x^2+x=x(x+1)x^2+x-6=(x+3)(x-2)约分:得x/(x-2)再问:题目炒错
4x^18-2x^12*x^6=4x^18-2x^18=2x^18