( )(5-x)=25-x²,(x的n次方+y的次方)( )=x的2n次方-y的2n次方(m²-5n)(5n+m²)=( ),(1+2x)(1-2x),用乘法公式计算:62×58,(-3m+2n)(-3m-2n)
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![( )(5-x)=25-x²,(x的n次方+y的次方)( )=x的2n次方-y的2n次方(m²-5n)(5n+m²)=( ),(1+2x)(1-2x),用乘法公式计算:62×58,(-3m+2n)(-3m-2n)](/uploads/image/z/3754069-61-9.jpg?t=%28+%29%285-x%29%3D25-x%26%23178%3B%2C%28x%E7%9A%84n%E6%AC%A1%E6%96%B9%2By%E7%9A%84%E6%AC%A1%E6%96%B9%29%28+%29%3Dx%E7%9A%842n%E6%AC%A1%E6%96%B9-y%E7%9A%842n%E6%AC%A1%E6%96%B9%28m%26%23178%3B-5n%29%285n%2Bm%26%23178%3B%29%3D%28+%29%2C%281%2B2x%29%281-2x%29%2C%E7%94%A8%E4%B9%98%E6%B3%95%E5%85%AC%E5%BC%8F%E8%AE%A1%E7%AE%97%EF%BC%9A62%C3%9758%2C%28-3m%2B2n%29%28-3m-2n%29)
( )(5-x)=25-x²,(x的n次方+y的次方)( )=x的2n次方-y的2n次方(m²-5n)(5n+m²)=( ),(1+2x)(1-2x),用乘法公式计算:62×58,(-3m+2n)(-3m-2n)
( )(5-x)=25-x²,(x的n次方+y的次方)( )=x的2n次方-y的2n次方
(m²-5n)(5n+m²)=( ),(1+2x)(1-2x),用乘法公式计算:62×58,
(-3m+2n)(-3m-2n)
( )(5-x)=25-x²,(x的n次方+y的次方)( )=x的2n次方-y的2n次方(m²-5n)(5n+m²)=( ),(1+2x)(1-2x),用乘法公式计算:62×58,(-3m+2n)(-3m-2n)
(5+x)(5-x)=25-x²,(x的n次方+y的次方)(x的n次方-y的次方)=x的2n次方-y的2n次方
(m²-5n)(5n+m²)=(m的4次方-25n²),(1+2x)(1-2x)=1-4x²
62×58=(60+2)×(60-2)
=60²-2²
=3596
(-3m+2n)(-3m-2n)
=(-3m)²-(2n)²
=9m²-4n²