八上数学题,因式分解 16(x-y)²-9(x+y)²=( )•(八上数学题,因式分解16(x-y)²-9(x+y)²=( )•( )

八上数学题,因式分解 16(x-y)²-9(x+y)²=( )•(八上数学题,因式分解16(x-y)²-9(x+y)²=( )•( )
八上数学题,因式分解 16(x-y)²-9(x+y)²=( )•(
八上数学题,因式分解
16(x-y)²-9(x+y)²=( )•( )

八上数学题,因式分解 16(x-y)²-9(x+y)²=( )•(八上数学题,因式分解16(x-y)²-9(x+y)²=( )•( )
16(x-y)²-9(x+y)²=(4x-4y+3x+3y)•(4x-4y-3x-3y)=(7x-y)•(x-7y)

16(x-y)^2-9(x+y)^2

=[4(x-y)]^2-[3(x+y)]^2

=(4x-4y+3x+3y)(4x-4y-3x-3y)
=(7x-y)(x-7y)

满意请采纳，谢谢！！