(1)计算题(有6题) (2)将下列各式因式分解1、(1)(-ab)³乘(-a²b)乘(-a²b的4次方c)²;(2)-3xy乘(xy-x²-2x²y³+1)(3)(a+3)(a²-1)-(2a²-1)(a-4
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![(1)计算题(有6题) (2)将下列各式因式分解1、(1)(-ab)³乘(-a²b)乘(-a²b的4次方c)²;(2)-3xy乘(xy-x²-2x²y³+1)(3)(a+3)(a²-1)-(2a²-1)(a-4](/uploads/image/z/14960851-43-1.jpg?t=%EF%BC%881%EF%BC%89%E8%AE%A1%E7%AE%97%E9%A2%98%EF%BC%88%E6%9C%896%E9%A2%98%EF%BC%89+%EF%BC%882%EF%BC%89%E5%B0%86%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A31%E3%80%81%EF%BC%881%EF%BC%89%EF%BC%88-ab%EF%BC%89%26%23179%3B%E4%B9%98%EF%BC%88-a%26%23178%3Bb%EF%BC%89%E4%B9%98%EF%BC%88-a%26%23178%3Bb%E7%9A%844%E6%AC%A1%E6%96%B9c%EF%BC%89%26%23178%3B%EF%BC%9B%EF%BC%882%EF%BC%89-3xy%E4%B9%98%EF%BC%88xy-x%26%23178%3B-2x%26%23178%3By%26%23179%3B%2B1%EF%BC%89%EF%BC%883%EF%BC%89%EF%BC%88a%2B3%EF%BC%89%EF%BC%88a%26%23178%3B-1%EF%BC%89-%EF%BC%882a%26%23178%3B-1%EF%BC%89%EF%BC%88a-4)
(1)计算题(有6题) (2)将下列各式因式分解1、(1)(-ab)³乘(-a²b)乘(-a²b的4次方c)²;(2)-3xy乘(xy-x²-2x²y³+1)(3)(a+3)(a²-1)-(2a²-1)(a-4
(1)计算题(有6题) (2)将下列各式因式分解
1、(1)(-ab)³乘(-a²b)乘(-a²b的4次方c)²;(2)-3xy乘(xy-x²-2x²y³+1)
(3)(a+3)(a²-1)-(2a²-1)(a-4) ;(4)(2m+3n)(2m-3m)
(5)(-3x²+y²)(y²+3x²); (6)(2x+1)²(2x-1)²
2、(1)m+m²-2m³ (2)a²(x-2a)²-a(x-2a)²
(1)计算题(有6题) (2)将下列各式因式分解1、(1)(-ab)³乘(-a²b)乘(-a²b的4次方c)²;(2)-3xy乘(xy-x²-2x²y³+1)(3)(a+3)(a²-1)-(2a²-1)(a-4
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1、
(1)(-ab)³乘(-a²b)乘(-a²b的4次方c)²
=(-a³b³)(-a²b)(a^4)(b^8)(c²)
=(a^9)(b^12)(c²)
(2)-3xy乘(xy-x²-2x²y³+1)
=6x³y^...
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1、
(1)(-ab)³乘(-a²b)乘(-a²b的4次方c)²
=(-a³b³)(-a²b)(a^4)(b^8)(c²)
=(a^9)(b^12)(c²)
(2)-3xy乘(xy-x²-2x²y³+1)
=6x³y^4 + 3x³y -3x²y² -3xy
(3)(a+3)(a²-1)-(2a²-1)(a-4)
=(a³+3a²-a-3)-(2a³-8a²-a+4)
=-a³+11a²-7
(4)(2m+3n)(2m-3m)(后面是-3n吧)
=(2m)²-(3n)²
=4m²-9n²
(5)(-3x²+y²)(y²+3x²)
=(y²+3x²)(y²-3x²)
=(y²)²-(3x²)²
=y^4 -9x^4
(6)(2x+1)²(2x-1)²
=[(2x+1)(2x-1)]²
=(4x²-1)²
=16x^4 -8x² +1
2、
(1)m+m²-2m³
=(m-m³)+(m²-m³)
=m(1-m²)+m²(1-m)
=m(1+m)(1-m)+m²(1-m)
=m(1-m)[(1+m)+m]
=(2m+1)(1-m)m
(2)a²(x-2a)²-a(x-2a)²
=a(a-1)(x-2a)²
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仅供参考