Question

计算：(1)(-x²)²+(3x³）²∕x² (2)123²

Answer 1

(1)(-x²)²+(3x³）²∕x²

=x^4+9x^6/x^2

=x^2+9x^4

(2)123²-122*124

=123^2-(123-1)(123+1)

=123^2-(123^2-1^2)

=123^2-123^2+1

=1