因式分解:x^2(a-b)^2-y^2(b-a)^2 (3m+2n)^2-(2m+3n)^2 16(m-n)^2-25(
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因式分解:x^2(a-b)^2-y^2(b-a)^2 (3m+2n)^2-(2m+3n)^2 16(m-n)^2-25(m+n)^2
a^2(a-3)+4(3-a) 计算:(-a-b)^2-(-a+b)^2 (m+2)(m-2)-(-m+2)^2 (-2a+b)^2-(b-2a)(-2a-b) (2a+b)^2-(-2a-b)^2 (a+2b)(a-2b)-4(2a-b)^2
a^2(a-3)+4(3-a) 计算:(-a-b)^2-(-a+b)^2 (m+2)(m-2)-(-m+2)^2 (-2a+b)^2-(b-2a)(-2a-b) (2a+b)^2-(-2a-b)^2 (a+2b)(a-2b)-4(2a-b)^2
![因式分解:x^2(a-b)^2-y^2(b-a)^2 (3m+2n)^2-(2m+3n)^2 16(m-n)^2-25(](/uploads/image/z/8171698-58-8.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9Ax%5E2%28a-b%29%5E2-y%5E2%28b-a%29%5E2+%EF%BC%883m%2B2n%29%5E2-%282m%2B3n%29%5E2+16%28m-n%29%5E2-25%28)
x^2(a-b)^2-y^2(b-a)^2
=x^2(a-b)^2-y^2(a-b)^2
=(a-b)^2(x^2-y^2)
=(a-b)^2(x+y)(x-y)
(3m+2n)^2-(2m+3n)^2
=[(3m+2n)+(2m+3n)]×[(3m+2n)-(2m+3n)]
=(5m+5n)×(m-n)
=5×(m+n)(m-n)
=5m^2-5n^2
16(m+n)^2-25(m-n)^2
=[4(m+n)+5(m-n)][4(m+n)-5(m-n)]
=(9m-n)(-m+9n)
a^2(a-3)+4(3-a)
=(a^2-4)(a-3)
=(a+2)(a-2)(a-3)
再问: 计算:(-a-b)^2-(-a+b)^2 (m+2)(m-2)-(-m+2)^2 (-2a+b)^2-(b-2a)(-2a-b) (2a+b)^2-(-2a-b)^2 (a+2b)(a-2b)-4(2a-b)^2拜托了~~~~~我都快急死了!谢谢你!!!!
再答: (-a-b)^2-(-a+b)^2 =(-a-b)+(-a+b) X (-a-b)-(-a+b) =(-a-b-a+b)(-a-b+a-b) =(-2a)(-2b)=4ab (-2a+b)^2-(b-2a)(-2a-b) =(-2a+b)^2-(-2ab-b²+4a²+2ab) =(-2a+b)^2-(2a-b)(2a+b) =(-2a+b)^2+(-2a+b)(2a+b) =(-2a+b)X (-2a+b)+(2a+b) =-2a+2b² (2a+b)^2-(-2a-b)^2 =[(2a+b)+(2a-b)]*[(2a+b)-(2a-b) =4aX2b =8ab
=x^2(a-b)^2-y^2(a-b)^2
=(a-b)^2(x^2-y^2)
=(a-b)^2(x+y)(x-y)
(3m+2n)^2-(2m+3n)^2
=[(3m+2n)+(2m+3n)]×[(3m+2n)-(2m+3n)]
=(5m+5n)×(m-n)
=5×(m+n)(m-n)
=5m^2-5n^2
16(m+n)^2-25(m-n)^2
=[4(m+n)+5(m-n)][4(m+n)-5(m-n)]
=(9m-n)(-m+9n)
a^2(a-3)+4(3-a)
=(a^2-4)(a-3)
=(a+2)(a-2)(a-3)
再问: 计算:(-a-b)^2-(-a+b)^2 (m+2)(m-2)-(-m+2)^2 (-2a+b)^2-(b-2a)(-2a-b) (2a+b)^2-(-2a-b)^2 (a+2b)(a-2b)-4(2a-b)^2拜托了~~~~~我都快急死了!谢谢你!!!!
再答: (-a-b)^2-(-a+b)^2 =(-a-b)+(-a+b) X (-a-b)-(-a+b) =(-a-b-a+b)(-a-b+a-b) =(-2a)(-2b)=4ab (-2a+b)^2-(b-2a)(-2a-b) =(-2a+b)^2-(-2ab-b²+4a²+2ab) =(-2a+b)^2-(2a-b)(2a+b) =(-2a+b)^2+(-2a+b)(2a+b) =(-2a+b)X (-2a+b)+(2a+b) =-2a+2b² (2a+b)^2-(-2a-b)^2 =[(2a+b)+(2a-b)]*[(2a+b)-(2a-b) =4aX2b =8ab
因式分解:x^2(a-b)^2-y^2(b-a)^2 (3m+2n)^2-(2m+3n)^2 16(m-n)^2-25(
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