问题:
计算:
(1)a(a+2) 2
(2)(2x+y)(2x-y)+(-x)(4x-y)
(3)4(x+y) 2-9(x-y) 2
(4)(-3x 2y 3) 2-(-2x 3y 2) 3÷(-2x 5y 5) 2.
计算:
(1)a(a+2) 2
(2)(2x+y)(2x-y)+(-x)(4x-y)
(3)4(x+y) 2-9(x-y) 2
(4)(-3x 2y 3) 2-(-2x 3y 2) 3÷(-2x 5y 5) 2.
(1)a(a+2) 2
(2)(2x+y)(2x-y)+(-x)(4x-y)
(3)4(x+y) 2-9(x-y) 2
(4)(-3x 2y 3) 2-(-2x 3y 2) 3÷(-2x 5y 5) 2.
参考答案: