Question

计算5ab^3*(-3/4a^3b^2)*(-2/3ab^4c)^3 x(x-1)(x+3)-x^2(x+1)+3x-1

Answer 1

5ab^3*(-3/4a^3b^2)*(-2/3ab^4c)^3

=5ab³×(-3/4a³b²)×(-8/27a³b^12c^3)

=10/9a^7b^17c³

x(x-1)(x+3)-x^2(x+1)+3x-1

=x(x²+2x-3)-x²(x+1)+3x-1

=x³+2x²-3x-x³-x²+3x-1

=x²-1