-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+(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+(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