-4a^2x^2+12ax-9=?4(x+y)^2-12(x+y)+9=?x^2+2x(y-z)+(z-y)^2=?(1/8a^3b^2c-4a^2b^3)(2a^2bc)^3=?(a-1/2b)^2+(a+1/2b)^2=?
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-4a^2x^2+12ax-9=?4(x+y)^2-12(x+y)+9=?x^2+2x(y-z)+(z-y)^2=?(1/8a^3b^2c-4a^2b^3)(2a^2bc)^3=?(a-1/2b)^2
-4a^2x^2+12ax-9=?4(x+y)^2-12(x+y)+9=?x^2+2x(y-z)+(z-y)^2=?(1/8a^3b^2c-4a^2b^3)(2a^2bc)^3=?(a-1/2b)^2+(a+1/2b)^2=?
-4a^2x^2+12ax-9=?4(x+y)^2-12(x+y)+9=?x^2+2x(y-z)+(z-y)^2=?(1/8a^3b^2c-4a^2b^3)(2a^2bc)^3=?
(a-1/2b)^2+(a+1/2b)^2=?
-4a^2x^2+12ax-9=?4(x+y)^2-12(x+y)+9=?x^2+2x(y-z)+(z-y)^2=?(1/8a^3b^2c-4a^2b^3)(2a^2bc)^3=?(a-1/2b)^2+(a+1/2b)^2=?
1、-4a²x²+12ax-9=-(4a²x²-12ax+9)=-(2ax+3)²
2、4(x+y)²-12(x+y)+9=[2(x+y)-3]²=(2x+2y-3)²
3、x²+2x(y-z)+(z-y)²=x²+2x(y-z)+(y-z)²=(x+y-z)²
4、(1/8a³b²c-4a²b³)(2a²bc)³
=1/8a²b²(ac-32b)(2a²bc)³
设常数a>=0 解方程x*x*x*x+6x*x*x+(9-2a)x*x-6ax+a*a-4=0
函数f(x)=x2-2ax+4a(x
已知f(x)={(2 a-1)x+4a,x≥ 1; ax,x
若不等式(ax-4a^2-9)(x-12)
若不等式(ax-4a^2-9)(x-12)
x^2+2x=4,2ax^2+4ax-12=0,2a^2+a=?
X平方+2X=4,且2AX平方+4AX-12=0,求2A平方+A
对于任意实x,f(x)=ax^2+2a(1-a)x+4a
x^2-ax+4
x^4-2ax^2+x+a^2-a因式分解,
因式分解x^4-2ax^2+x+a^2-a
(a+1)/x+2ax+4
不等式ax^2-7x+4a
不等式ax^2-7x+4a
x^2-ax+1-4a
已知集合A={x|(4x^2-16x+21)/(x^2-2x+1)>=5},B={x|x^2-ax+9
x²+2x-3=0且2ax²+4ax+12=0,求a的值
2x-1=x-a 2ax-4=x-3(a不等于二分之一)