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=( )•( )
2019-06-20
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=( )•( )
优质解答
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=(4x-4y+3x+3y)•(4x-4y-3x-3y)=(7x-y)•(x-7y)