作业帮(-2x)^4-(-3x²)²-[-(4x²)²]+3(-x)³·x
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/14 22:57:12
![(-2x)^4-(-3x²)²-[-(4x²)²]+3(-x)³·x](/uploads/image/z/342859-67-9.jpg?t=%28-2x%29%5E4-%28-3x%26%23178%3B%29%26%23178%3B-%5B-%284x%26%23178%3B%29%26%23178%3B%5D%2B3%28-x%29%26%23179%3B%C2%B7x)
(-2x)^4-(-3x²)²-[-(4x²)²]+3(-x)³·x
(-2x)^4-(-3x²)²-[-(4x²)²]+3(-x)³·x
(-2x)^4-(-3x²)²-[-(4x²)²]+3(-x)³·x
=(2x)^4-(3x²)^2+(4x²)^2-3x^4
=16x^4-9x^4+16x^4-3x^4
=21x^4
=16x^4-9x^4+16x^4-3x^4
=20x^4
(-2x)⁴-(-3x²)²-[-(4x²)²]+3(-x)³·x=(16x⁴)-(9x⁴)+(16x⁴)-(3x⁴)
=(16-9+16-3)x⁴=20x⁴