5x(2x²-3x+4)=?
问题描述:
5x(2x²-3x+4)=?
答
5x(2x²-3x+4)
=5x2x²-5×3x+5×4
=10x²-15x+20
5x(2x²-3x+4)=?
5x(2x²-3x+4)
=5x2x²-5×3x+5×4
=10x²-15x+20