数学题!急!过程!(因式分解)(1)(-2)^2001+(-2)^2002-2^2001(2)(25^5+5^11)÷30(3)a^3-2a²b+ab²(4)-a^3+15ab²-9ac²(5)(x²+4)²-16x²(6)已知X=6.61,Y=-3.39,
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![数学题!急!过程!(因式分解)(1)(-2)^2001+(-2)^2002-2^2001(2)(25^5+5^11)÷30(3)a^3-2a²b+ab²(4)-a^3+15ab²-9ac²(5)(x²+4)²-16x²(6)已知X=6.61,Y=-3.39,](/uploads/image/z/2098034-26-4.jpg?t=%E6%95%B0%E5%AD%A6%E9%A2%98%21%E6%80%A5%21%E8%BF%87%E7%A8%8B%21%EF%BC%88%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%89%EF%BC%881%EF%BC%89%EF%BC%88%EF%BC%8D2%EF%BC%89%5E2001%2B%EF%BC%88%EF%BC%8D2%EF%BC%89%5E2002%EF%BC%8D2%5E2001%EF%BC%882%EF%BC%89%EF%BC%8825%5E5%2B5%5E11%EF%BC%89%C3%B730%EF%BC%883%EF%BC%89a%5E3%EF%BC%8D2a%26%23178%3Bb%2Bab%26%23178%3B%EF%BC%884%EF%BC%89%EF%BC%8Da%5E3%2B15ab%26%23178%3B%EF%BC%8D9ac%26%23178%3B%EF%BC%885%EF%BC%89%EF%BC%88x%26%23178%3B%2B4%EF%BC%89%26%23178%3B%EF%BC%8D16x%26%23178%3B%EF%BC%886%EF%BC%89%E5%B7%B2%E7%9F%A5X%3D6.61%2CY%3D%EF%BC%8D3.39%2C)
数学题!急!过程!(因式分解)(1)(-2)^2001+(-2)^2002-2^2001(2)(25^5+5^11)÷30(3)a^3-2a²b+ab²(4)-a^3+15ab²-9ac²(5)(x²+4)²-16x²(6)已知X=6.61,Y=-3.39,
数学题!急!过程!(因式分解)
(1)(-2)^2001+(-2)^2002-2^2001
(2)(25^5+5^11)÷30
(3)a^3-2a²b+ab²
(4)-a^3+15ab²-9ac²
(5)(x²+4)²-16x²
(6)已知X=6.61,Y=-3.39,求(X-Y)(X²+3XY+Y²)-5XY(X-Y)的值.
(7)甲、乙两个同学分解因式x²+ax+b时,甲看错了b,分解结果为(x+2)(x+4);乙看错了a,分解结果为(x+1)(x+9),则a=____,b=____.
(8)甲、乙、丙三家房地产公司相同的商品房售价20.15万元,为盘活动资金,甲、乙分别让利7%、13%,丙的让利是甲、乙两家公司让利之和.则丙共让利______万元.
数学题!急!过程!(因式分解)(1)(-2)^2001+(-2)^2002-2^2001(2)(25^5+5^11)÷30(3)a^3-2a²b+ab²(4)-a^3+15ab²-9ac²(5)(x²+4)²-16x²(6)已知X=6.61,Y=-3.39,
(1)(-2)^2001+(-2)^2002-2^2001=(-2)^2001+(-2)^2001×(-2)-2^2001=2^2001-2^2001=0
(2)(25^5+5^11)÷30=(5^10+5^11)÷30=(6×5^10)÷30=5^10×1/5=5^10×5^(-1)=5^9
(3)a^3-2a²b+ab²=a(a^2-2ab+b²)=a(a-b)^2
(4)-a^3+15ab²-9ac²= 这个你是不是写错题 ,不然分解不了的
(5)(x²+4)²-16x²=x^4+8x^2+16-16x²=x^4-8x^2+16=(x²-4)²
(X-Y)(X²+3XY+Y²)-5XY(X-Y)=(X-Y)(X²-2XY+Y²)=(X-Y)(X-Y)²=(X-Y)^3
(7) (x+2)(x+4)=x²+6x+8;甲看错了b,a对,a=6
(x+1)(x+9= x²+10x+9,乙看错了a,b对,b=9.
(8)20.15×7%+20.15×13%=20.15×20%=4.03万元
同学 很累的 给点分