(1)3a^2-2a+1-a^2+5a-6(2) (4x-3y)-(-(3y-x)+(x-y))-5x(3)(m+3)(m-3)^2(4)(a^2+9)^2-(a+3)(3-a)(a^2+9)(5)(-x^2×x^5)^2÷(-x^2)^3(6)2×2^n÷2^n-1 -(-1又二分之一)^8×(1/3)^8×(-2)^10因式分解:(1)x^3-2x^2+xy^2(2)a^2-b^2+2b-1希望在 8:50
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/25 19:36:27
![(1)3a^2-2a+1-a^2+5a-6(2) (4x-3y)-(-(3y-x)+(x-y))-5x(3)(m+3)(m-3)^2(4)(a^2+9)^2-(a+3)(3-a)(a^2+9)(5)(-x^2×x^5)^2÷(-x^2)^3(6)2×2^n÷2^n-1 -(-1又二分之一)^8×(1/3)^8×(-2)^10因式分解:(1)x^3-2x^2+xy^2(2)a^2-b^2+2b-1希望在 8:50](/uploads/image/z/12506401-1-1.jpg?t=%281%293a%5E2-2a%2B1-a%5E2%2B5a-6%282%29+%284x-3y%29-%28-%283y-x%29%2B%28x-y%29%29-5x%283%29%28m%2B3%29%28m-3%29%5E2%284%29%28a%5E2%2B9%29%5E2-%28a%2B3%29%283-a%29%28a%5E2%2B9%29%285%29%28-x%5E2%C3%97x%5E5%29%5E2%C3%B7%28-x%5E2%29%5E3%EF%BC%886%EF%BC%892%C3%972%5En%C3%B72%5En-1+-%28-1%E5%8F%88%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%29%5E8%C3%97%281%2F3%29%5E8%C3%97%28-2%29%5E10%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9A%EF%BC%881%EF%BC%89x%5E3-2x%5E2%2Bxy%5E2%282%29a%5E2-b%5E2%2B2b-1%E5%B8%8C%E6%9C%9B%E5%9C%A8+8%EF%BC%9A50)
(1)3a^2-2a+1-a^2+5a-6(2) (4x-3y)-(-(3y-x)+(x-y))-5x(3)(m+3)(m-3)^2(4)(a^2+9)^2-(a+3)(3-a)(a^2+9)(5)(-x^2×x^5)^2÷(-x^2)^3(6)2×2^n÷2^n-1 -(-1又二分之一)^8×(1/3)^8×(-2)^10因式分解:(1)x^3-2x^2+xy^2(2)a^2-b^2+2b-1希望在 8:50
(1)3a^2-2a+1-a^2+5a-6
(2) (4x-3y)-(-(3y-x)+(x-y))-5x
(3)(m+3)(m-3)^2
(4)(a^2+9)^2-(a+3)(3-a)(a^2+9)
(5)(-x^2×x^5)^2÷(-x^2)^3
(6)2×2^n÷2^n-1 -(-1又二分之一)^8×(1/3)^8×(-2)^10
因式分解:
(1)x^3-2x^2+xy^2
(2)a^2-b^2+2b-1
希望在 8:50分前做出来,超过时间就没了
速度快正确率高的 我再加50分
那道题我没抄错,本子上就是这么写的
(1)3a^2-2a+1-a^2+5a-6(2) (4x-3y)-(-(3y-x)+(x-y))-5x(3)(m+3)(m-3)^2(4)(a^2+9)^2-(a+3)(3-a)(a^2+9)(5)(-x^2×x^5)^2÷(-x^2)^3(6)2×2^n÷2^n-1 -(-1又二分之一)^8×(1/3)^8×(-2)^10因式分解:(1)x^3-2x^2+xy^2(2)a^2-b^2+2b-1希望在 8:50
(1)3a^2-2a+1-a^2+5a-6
= 2a^2+3a-5
(2)(4x-3y)-(-(3y-x)+(x-y))-5x
=4x-3y-(-3y+x+x-y)-5x
=4x-3y-(-4y+2x)-5x
=4x-3y+4y-2x-5x
=y-3x
(3)(m+3)(m-3)^2
=(m+3)(m-3)(m-3)
=(m^2-9)(m-3)
=m^3-3m^2-9m+27
(4)(a^2+9)^2-(a+3)(3-a)(a^2+9)
=(a^2+9)[(a^2+9)-(a+3)(3-a)]
=(a^2+9)[(a^2+9)+(a^2-9)]
=(a^2+9)(2a^2)
=2a^4+18a^2
(5)(-x^2×x^5)^2÷(-x^2)^3
= (-x^7)^2÷(-x^6)
= x^14÷(-x^6)
= -x^8
(6)2×2^n÷2^n-1 -(-1又二分之一)^8×(1/3)^8×(-2)^10
= 2×2^n÷2^n-1 -(-3/2)^8×(1/3)^8×(-2)^10
= 2×2 -(-3/2×1/3)^8×(-2)^10
= 4 -(-1/2)^8×(-2)^10
= 4 -(1/2^8)×2^10
= 4 -2^2
= 0
(1)x^3-2x^2+xy^2
= x(x^2-2x+y^2)
(2)a^2-b^2+2b-1 无法分解,请检查原题
2k
那么简单,你只要是人就会做,第6题还有一丁点难度
=2a^2+3a-5 = (a-1)(2a+5)
=y-3x
=m^3-9m-3m^2+27
=(a^2-8)(a^2+9) =a^4+a^2-72
=-x^8
=-3
=x(x^2-2x+y^2)
=(a+b-10(a-b+1)
1)3a^2-2a+1-a^2+5a-6
= 2a^2+3a-5
(2)(4x-3y)-(-(3y-x)+(x-y))-5x
=4x-3y-(-3y+x+x-y)-5x
=4x-3y-(-4y+2x)-5x
=4x-3y+4y-2x-5x
=y-3x
(3)(m+3)(m-3)^2
=(m+3)(m-3)(m-3)
=(m^2...
全部展开
1)3a^2-2a+1-a^2+5a-6
= 2a^2+3a-5
(2)(4x-3y)-(-(3y-x)+(x-y))-5x
=4x-3y-(-3y+x+x-y)-5x
=4x-3y-(-4y+2x)-5x
=4x-3y+4y-2x-5x
=y-3x
(3)(m+3)(m-3)^2
=(m+3)(m-3)(m-3)
=(m^2-9)(m-3)
=m^3-3m^2-9m+27
(4)(a^2+9)^2-(a+3)(3-a)(a^2+9)
=(a^2+9)[(a^2+9)-(a+3)(3-a)]
=(a^2+9)[(a^2+9)+(a^2-9)]
=(a^2+9)(2a^2)
=2a^4+18a^2
(5)(-x^2×x^5)^2÷(-x^2)^3
= (-x^7)^2÷(-x^6)
= x^14÷(-x^6)
= -x^8
(6)2×2^n÷2^n-1 -(-1又二分之一)^8×(1/3)^8×(-2)^10
= 2×2^n÷2^n-1 -(-3/2)^8×(1/3)^8×(-2)^10
= 2×2 -(-3/2×1/3)^8×(-2)^10
= 4 -(-1/2)^8×(-2)^10
= 4 -(1/2^8)×2^10
= 4 -2^2
= 0
因式分
(1)x^3-2x^2+xy^2
= x(x^2-2x+y^2)
第二小题,题抄错了
收起