(3a b)x(2a-b)-
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![(3a b)x(2a-b)-](/uploads/image/f/11844-36-4.jpg?t=%283a+b%29x%282a-b%29-)
(a-b)x>ab(a+b)当a=b时不等式化为0x>2a^3所以对于这个式子因为无论x取任何值,左边都是0所以当a≤0时,x取任何值上式都成立当a>0时,x取任何值上式都不会成立,也就是无解
4ab(a+b)^2-6a^2b(a+b)=2ab(a+b)[2(a+b)-3a]=2ab(a+b)(2b-a)(x+y)^2(x-y)+(x+y)(x-y)^2=(x+y)(x-y)[(x+y)+(
根据题意得y=3|-2-x|=6∴x=4x=-8y=3y=3∴A(-2,3)B的坐标是(4,3)或(-8,3)
证明:由(a+b)^2>0得a^2+b^2>2ab由x>a^2+b^2得x>2a
[(x+y)*(x-y)]*3x=[3(x+y)+2(x-y)]*3x=(5x+y)*3x=3(5x+y)+2*3x=21x+3y
{3x^2(a^2+b^2)-3a^2b^2+3[x^2+(a+b)x+ab]*[x(x-a)-b(x-a)]}/2x^2=3/2{x^2a^2+x^2b^2-a^2b^2+[x^2+(a+b)x+a
x(a-x)(a-y)-y(x-a)(y-a)=(x-y)(x-a)(y-a)-ab(a-b)^2+a(b-a)^2=(a-b)^2(-ab+a)=a(a-b)^2(1-b)a^3b-ab=ab(a^
[ab(3-b)-2a(b-1/2b^2)]x(-3a^2b^3)=[3ab-ab^2-2ab+ab^2]*(-3a^2b^3)=ab*(-3a^2b^3)=-3a^3b^4
【(x-y)*(x+y)】*x=[2(x-y)-3(x+y)]*x=(-x-5y)*x=2(-x-5y)-3x=-2x-10y-3x=-5x-10y
9a^2-b^2b^2-a^2/49y^2+6xy+4x^29a^2b^2+12ab^2+4b^2-4a^3/3b-6x+2y-1
由:4-9x4/9由:(2a-b)x+3a-4
9ab²+6abc/3ab=3ab(3b+2c)/3ab=3b+2c9a²+6ab+b²/3a+b=(3a+b)²/(3a+b)=3a+bx²-36/
别用+号,不然就无限循环下去了,没得做的.再问:定义新运算“+”如下:a”+”b=ab-a+b,则(x-1)”+”(2x+3)再答:=(x-1)(2x+3)-(x-1)+(2x+3)=2x^2+x-3
如果ab-a*1/3b理解为ab-a*(1/3)bab-a*1/3b=ab-1/3ab=(1-1/3)ab=2/3ab如果ab-a*1/3b理解为ab-a*1/(3b)ab-a*1/(3b)=a[b&
(1)ab(x^2+1)+x(a^2+b^2)=abx^2+ab+xa^2+xb^2=ax(bx+a)+b(bx+a)=(ax+b)(bx+a)(2)x^2-y^2-z^2-2yz=x^2-(y+z)
(2a+3b)X=2013无解∴2a+3b=0∴B.ab≤0
3a^2-10ab+3b^2=(3a-b)(a-3b)x^2+2(a+b)x-(3a^2-10ab+3b^2)=(x-3a+b)(x-a+3b)
[ab-a平方b]-[2ab-3a平方b]=2a²b-ab[x-x平方+1】-2【x平方-1+3x]=-3x²-5x+33x平方-【5x-[x-[x-3]+2x平方】=3x
(x+a)(x+b)=x的2次方+3x-4x²+(a+b)x+ab=x²+3x-4a+b=3ab=-4(a+b)-ab=3+4=7很高兴为您解答,祝你学习进步!【the1900】团
x^2-5x-6=(x-6)(x+1)y^2-x-12=(y+3)(y-4)(a+b)^3-(a+b)=(a+b)[(a+b)^2-1]=(a+b)[(a+b)^2-1^2]=(a+b)(a+b-1)