问题
填空题
化简(x-3)(x+2)-(x+3)²=()
答案
参考答案:-7x-15
解析:
(x-3)(x+2)-(x+3)² =(x²-x-6)-(x²+6x+9) =x²-x-6-x²-6x-9 =-7x-15
化简(x-3)(x+2)-(x+3)²=()
参考答案:-7x-15
解析:
(x-3)(x+2)-(x+3)² =(x²-x-6)-(x²+6x+9) =x²-x-6-x²-6x-9 =-7x-15