Question

急需！ 要过程！

急需！
要过程！要过程！

Answer 1

(1)=x^4 + 8x² + 16 - 16x²
=x^4 - 8x² + 16
=(x² - 4)²
=(x+2)²(x-2)²

追答

(2)=(x² - 9)²=(x+3)²(x-3)²
(3)=(4x²)² - 1
=(4x² + 1)(4x² - 1)
=(2x+1)(2x-1)(4x² + 1)
(4)=(x-y)(x² - y²)
=(x-y)(x-y)(x+y)
=(x+y)(x-y)²
(5)=a(a² - 2a + 1)=a(a-1)²
(6)=y(4x² + 4xy + y²)
=y(2x + y)²

(7)=n(m² + 14m + 49)
=n(m + 7)²
(8)=5x²y(2x - 1 - x²)
=-5x²y(x² - 2x + 1)
=-5x²y(x-1)²

Answer 2

这是十字相乘吧