初一数学平方差公式问题1、计算(x+1)(x的平方+1)(x-1)(x的四次方+1)2、若x的平方-y的平方=24,x+

5个回答

  • 1(x+1)(x^2+1)(x-1)(x^4+1)

    =(x^2-12)(x^2+1)(x^4+1)

    =[(x^2)2-(12)2](x^4+1)

    =(x^4-1)(x^4+1)

    =(x^4)2-1

    =x^8-1

    2 x^2-y^2=24

    (x+y)(x-y)=24

    ∵x+y=6

    ∴6(x-y)=24

    ∴ (x-y)=24÷6

    =4

    3 有,得到的矩形面积比正方形面积小1

    4 a=2009^2-(2010x2008)

    =2009^2-(2009+1)(2009-1)

    =2009^2-(2009^2-1)

    =2009^2-2009^2+1

    =1

    5 不懂,应该是题目有问题.

    题目如果是

    (2-1)(2+1)(2^2+1)(2^4+1)(2^8+1)(2^16+1)(2^32+1)+1

    =(2^2-1)(2^2+1)(2^4+1)(2^8+1)(2^16+1)(2^32+1)+1

    =(2^4-1)(2^4+1)(2^8+1)(2^16+1)(2^32+1)+1

    =(2^8-1)(2^8+1)(2^16+1)(2^32+1)+1

    =(2^16-1)(2^16+1)(2^32+1)+1

    = (2^32-1)(2^32+1)+1

    =(2^64-1)+1

    =2^64