(1).(2-3a^2)(3a^2-2)
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(1).(2-3a^2)(3a^2-2)
(2)(1/2x+2)(1/2x+2)+(-3-x)(-x-3)
^号代表平方.
(2)(1/2x+2)(1/2x+2)+(-3-x)(-x-3)
^号代表平方.
![(1).(2-3a^2)(3a^2-2)](/uploads/image/z/19651353-33-3.jpg?t=%281%29.%282-3a%5E2%29%283a%5E2-2%29)
(1).(2-3a^2)(3a^2-2)
=[-(3a^2-2)](3a^2-2)
=-(3a^2-2)^2
=-(9a^4-12a^2+4)
=-9a^4+12a^2-4
(2)(1/2x+2)(1/2x+2)+(-3-x)(-x-3)
=(1/2x+2)^2+(-3-x)^2
=(1/4x^2+2x+4)+(9+6x+x^2)
=5/4x^2+8x+13
=[-(3a^2-2)](3a^2-2)
=-(3a^2-2)^2
=-(9a^4-12a^2+4)
=-9a^4+12a^2-4
(2)(1/2x+2)(1/2x+2)+(-3-x)(-x-3)
=(1/2x+2)^2+(-3-x)^2
=(1/4x^2+2x+4)+(9+6x+x^2)
=5/4x^2+8x+13
(a 1)(a 2)(a 3)(a
a(a-1)(a-2)(a-3)(a-4)因式分解
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a-a a=[ ] [4]a-a=a+a
合并同类项3a*3a+a*a-(2a*2a)+(3a-a*a)
a+a^2+a^3+a^4
(a+1)(a+2)(a-3)计算
1A,2A,3A...
因式分解:a(a-2)(a-3)(a+1)+2
(a-1)(a-2)(a-3)(a-4)-3因式分解,
计算;(a^3)^4+a^10×a^2-a×a^2-a*a^3*a^8
(2a^2+3a+2)/(a+1)-(a^2-a-5)/(a+2)-(3a^2-4a-5)/(a-2)+(2a^2-8a
1+a^1+a^2+a^3+.+a^n=?