(-3x²)(-x²+2x-1) 等于?
问题描述:
(-3x²)(-x²+2x-1) 等于?
答
(-3x²)(-x²+2x-1)
=3x^4-6x³+3x²
(-3x²)(-x²+2x-1) 等于?
(-3x²)(-x²+2x-1)
=3x^4-6x³+3x²