x方-2x-8
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4x2=(x-2)2=x2-4x+4化简得到(3x-2)*(x+2)=0所以x=-2或x=2∕3(2x2-8x+8)/(x-2)=2(x-2)2∕(x-2)=2(x-2)然后把x=-2和x=2∕3分别
lim(x³-2x-5)/(7x³+5x²+6x+8)x→0=(0-0-5)/(0+0+0+8)=-5/8
3x^2-2x-8=(3x-4)(x+2)
x方+6x=1x方+6x+9=1+9(x+3)方=10x+3=±√10x=-3±√10x方-14x=8x方-14x+49=8+49(x-7)方=57x-7=±√57x=7±√57x方+2x+2=8x+
八次方的系数是:-33四次方的系数是:-54(2x^8)*(-8)+(-3x^6)*(2x^2)+(-7x^3)*(3x^5)=-16x^8-6x^8-21x^8=-33x^8(4x^4)*(-8)+
原式乘积中的2次项有8x²-2px²+qx²=(8-2p+q)x²不含x方项,则8-2p+q=0(1)原式乘积中的3次项有px³-2x³=(
5X²-2=(√5x+√2)(√5x-√2)x四次方-4x²+4=(x²-2)²=(x+√2)²(x-√2)²x四次方+2x²-8
/>X²-6X+8=0X²-6X+9=1(x-3)²=1于是[2(X-3)²]³÷(X-3)²=8[(X-3)³]²÷(
x的四次方+7x的三次方+8x的二次方-13x+15x^4+7x^3+8x^2-13x+15=x^4+2x^3+5x^3+8x^2-13x+15=x^2(x^2+2x)+5x^3+8x^2-13x+1
雨后泪樱花,1、x^3-6x^2+9x=x(x^2-6x+9)=x(x-3)^22、-x^4+8x^2-16=-(x^4-8x+16)=-(x^2-4)^2=-(x+2)^2(x-2)^2
1.x³-2x²y+xy²=x(x²-2xy+y²)=x(x-y)²2.8a²b-2b=2b(4a²-1)=2b(2a-
原式=x²×(-x³)+2x×(x的4次方)+x×x的4次方=-x的5次方+2x的5次方+x的5次方=2x的5次方很高兴为您解答,祝你学习进步!【学习宝典】团队为您答题.有不明白的
原式=[x/(x-1)-x/(x+1)(x-1)]÷[x(x-1)/(x-1)²]=[x/(x-1)-x/(x+1)(x-1)]÷[x/(x-1)]=[x/(x-1)-x/(x+1)(x-1
原式=8x^5y²/(-2x²y)-4x²y^5/(-2x²y)=-4x³y+2y³
是f(x)=2X^3+6x^2-8x,g(x)=9x^5-12x^4+27x^3,求f(x)(-x/2)+g(x)/(3x)发吧?f(x)(-x/2)+g(x)/(3x)=(2X^3+6x^2-8x)
x4+2x3-9x2-2x+8=0,发现x=1是方程的根,(x4+2x3-9x2-2x+8)/(x-1)=x3+3x2-6x-8x3+3x2-6x-8=0,发现x=2是方程的根,(x3+3x2-6x-
原式可化简为:(-x方+8+6x立方)+(-2x立方+5x-7)=-x方+8+6x立方-2x立方+5x-7.(去括号)=4x立方-x方+5x+1.(合并同类项)=4x(-2)立方-(-2)平方+5x(
-8x四次方y+6x三次方y²-2x三次方y=-2x³y(4x-3y+1)
(2x-3)(x-4)-(x+2)(x-3)=x的二次方+82x²-8x-3x+12-(x²-3x+2x-6)=x²+8x²-10x+18=x²+8-
x^3-2x^2+2=x(x^2-2x+1)=x(x-1)^2