(2a-b)(4a²+b²)(b+a) (2x-y)²-4(x-y)(x+2y)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 13:26:54
![(2a-b)(4a²+b²)(b+a) (2x-y)²-4(x-y)(x+2y)](/uploads/image/z/7640225-17-5.jpg?t=%282a-b%29%284a%26%23178%3B%2Bb%26%23178%3B%29%28b%2Ba%29+%282x-y%29%26%23178%3B-4%28x-y%29%28x%2B2y%29)
(2a-b)(4a²+b²)(b+a) (2x-y)²-4(x-y)(x+2y)
(2a-b)(4a²+b²)(b+a) (2x-y)²-4(x-y)(x+2y)
(2a-b)(4a²+b²)(b+a) (2x-y)²-4(x-y)(x+2y)
(2a-b)(4a²+b²)(b+2a)
这里应该是2a吧!
(2a-b)(4a²+b²)(b+2a)
=(2a+b)(2a-b)(4a²+b²)
=(4a²-b²) (4a²+b²)
=16a的4次幂 - b的4次幂
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(2x-y)²-4(x-y)(x+2y)
=4x²-4xy+y²- 4(x²+xy-2y²)
=4x²-4xy+y²- 4x²-4xy+8y²
=-8xy+9y²