Question

初一的数学题【计算题】1.-[a+b]^5*[a+b]^22.a^2n+1*a^2n-13.10^4*10^÷10^-2

Answer 1

1.-[a+b]^5*[a+b]^2

=-(a+b)^(2+5)

=-(a+b)^7

2.a^2n+1*a^2n-1

=a^(2n+1+2n-1)

=a^4n

3.10^4*10^÷10^-2

=10^(4+2-(-2))

=10^8

4.[1/7]^0÷[-1/7]^-1

=1÷(-7)

=-1/7

5.[x+2y+3z][x+2y-3z]

=(x+2y)²-(3z)²

=x²+4xy+4y²-9z²