利用平方差公式计算 大侠们【1】(4+3a)(-4+3a) 【2】(2m-3n)(-2m-3n) 【3】(-xy-3z)(3z-xy) 【4】(x^4+y^4)(x^2+y^2)(x+y)(x-y) 【5】(2/3 x^2+1/2 y^3)(1/2 y^3-2/3 x^2) 【6】x^2(x+1)(x-1)+x^2
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![利用平方差公式计算 大侠们【1】(4+3a)(-4+3a) 【2】(2m-3n)(-2m-3n) 【3】(-xy-3z)(3z-xy) 【4】(x^4+y^4)(x^2+y^2)(x+y)(x-y) 【5】(2/3 x^2+1/2 y^3)(1/2 y^3-2/3 x^2) 【6】x^2(x+1)(x-1)+x^2](/uploads/image/z/12516907-67-7.jpg?t=%E5%88%A9%E7%94%A8%E5%B9%B3%E6%96%B9%E5%B7%AE%E5%85%AC%E5%BC%8F%E8%AE%A1%E7%AE%97+%E5%A4%A7%E4%BE%A0%E4%BB%AC%E3%80%901%E3%80%91%284%2B3a%29%28-4%2B3a%29+%E3%80%902%E3%80%91%282m-3n%29%28-2m-3n%29+%E3%80%903%E3%80%91%28-xy-3z%29%283z-xy%29+%E3%80%904%E3%80%91%28x%5E4%2By%5E4%29%28x%5E2%2By%5E2%29%28x%2By%29%28x-y%29+%E3%80%905%E3%80%91%282%2F3+x%5E2%2B1%2F2+y%5E3%29%281%2F2+y%5E3-2%2F3+x%5E2%29+%E3%80%906%E3%80%91x%5E2%28x%2B1%29%28x-1%29%2Bx%5E2)
利用平方差公式计算 大侠们【1】(4+3a)(-4+3a) 【2】(2m-3n)(-2m-3n) 【3】(-xy-3z)(3z-xy) 【4】(x^4+y^4)(x^2+y^2)(x+y)(x-y) 【5】(2/3 x^2+1/2 y^3)(1/2 y^3-2/3 x^2) 【6】x^2(x+1)(x-1)+x^2
利用平方差公式计算 大侠们
【1】(4+3a)(-4+3a) 【2】(2m-3n)(-2m-3n) 【3】(-xy-3z)(3z-xy) 【4】(x^4+y^4)(x^2+y^2)(x+y)(x-y) 【5】(2/3 x^2+1/2 y^3)(1/2 y^3-2/3 x^2) 【6】x^2(x+1)(x-1)+x^2
利用平方差公式计算 大侠们【1】(4+3a)(-4+3a) 【2】(2m-3n)(-2m-3n) 【3】(-xy-3z)(3z-xy) 【4】(x^4+y^4)(x^2+y^2)(x+y)(x-y) 【5】(2/3 x^2+1/2 y^3)(1/2 y^3-2/3 x^2) 【6】x^2(x+1)(x-1)+x^2
1】(4+3a)(-4+3a)
=9a^2-16
【2】(2m-3n)(-2m-3n)
=(3n-2m)(3n+2m)
=9n^2-4m^2
【3】(-xy-3z)(3z-xy)
=(-xy)^2-9z^2
=x^2y^2-9z^2
【4】(x^4+y^4)(x^2+y^2)(x+y)(x-y)
=(x^4+y^4)(x^2+y^2)(x^2-y^2)
=(x^4+y^4)(x^4-y^4)
=x^8-y^8
【5】(2/3 x^2+1/2 y^3)(1/2 y^3-2/3 x^2)
=(1/2 y^3)^2-(2/3 x^2)^2
=1/4y^6-4/9x^4
【6】x^2(x+1)(x-1)+x^2
=x^2(x^2-1)+x^2
=X^4