因式分解【要过程】
5个回答
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(1)(x+y)(5m+3n)^2-(x+y)(m-n)^2
=(x+y)【(5m+3n)^2-(m-n)^2】
=(x+y)(5m+3n-m+n)(5m+3n+m-n)
=(x+y)(4m+4n)(6m+2n)
=8(x+y)(m+n)(3m+n)
(2) x^n+4-x^n
= x^n(x^4-1)
= x^n(x²-1)(x²+1)
==x^n(x-1)(x+1)(x²+1)
=(x+y)【(5m+3n)^2-(m-n)^2】
=(x+y)(5m+3n-m+n)(5m+3n+m-n)
=(x+y)(4m+4n)(6m+2n)
=8(x+y)(m+n)(3m+n)
(2) x^n+4-x^n
= x^n(x^4-1)
= x^n(x²-1)(x²+1)
==x^n(x-1)(x+1)(x²+1)
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(x+y)(5m+3n)^2-(x+y)(m-n)^2
=(x+y)[(5m+3n)^2-(m-n)^2]
=(x+y)[(5m+3n)-(m-n)][(5m+3n)+(m-n)]
=(x+y)(5m+3n-m+n)(5m+3n+m-n)
=(x+y)(4m+4n)(6m+2n)
=8(x+y)(m+n)(3m+n)
(2) x^(n+4)-x^n
=x^n*x^4-x^n
=x^n(x^4-1)
=x^n(x^2-1)(x^2+1)
=x^n(x-1)(x+1)(x^2+1)
=(x+y)[(5m+3n)^2-(m-n)^2]
=(x+y)[(5m+3n)-(m-n)][(5m+3n)+(m-n)]
=(x+y)(5m+3n-m+n)(5m+3n+m-n)
=(x+y)(4m+4n)(6m+2n)
=8(x+y)(m+n)(3m+n)
(2) x^(n+4)-x^n
=x^n*x^4-x^n
=x^n(x^4-1)
=x^n(x^2-1)(x^2+1)
=x^n(x-1)(x+1)(x^2+1)
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(1)(x+y)(5m+3n)^2-(x+y)(m-n)^2
=(x+y)(25m²+30mn+9n²-m²+2mn-n²)
=(x+y)(24m²+32mn+8n²)
=8(x+y)(3m²+4mn+n²)
=8(x+y)(3m+n)(m+n)
(2) x^n+4-x^n
=4
你的第二题题目错了吧?
=(x+y)(25m²+30mn+9n²-m²+2mn-n²)
=(x+y)(24m²+32mn+8n²)
=8(x+y)(3m²+4mn+n²)
=8(x+y)(3m+n)(m+n)
(2) x^n+4-x^n
=4
你的第二题题目错了吧?
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(1)(x+y)(5m+3n)^2-(x+y)(m-n)^2
=(x+y)[(5m+3n)^2-(x+y)(m-n)^2]
=(x+y)[(5m+3n)+(m-n)][(5m+3n)-(m-n)]
=(x+y)(5m+3n+m-n)(5m+3n-m+n)
=(x+y)(6m+2n)(4m+4n)
=8(x+y)(3m+n)(m+n)
(2) x^n+4-x^n
=4
=(x+y)[(5m+3n)^2-(x+y)(m-n)^2]
=(x+y)[(5m+3n)+(m-n)][(5m+3n)-(m-n)]
=(x+y)(5m+3n+m-n)(5m+3n-m+n)
=(x+y)(6m+2n)(4m+4n)
=8(x+y)(3m+n)(m+n)
(2) x^n+4-x^n
=4
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